Researcher basic information

• (BLANK), The University of Tokyo

• https://researchmap.jp/yoshii_toshio?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200901087884646606

• 200901087884646606

• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Civil engineering plan and transportation engineering
• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Safety engineering
• Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Social systems engineering

• Bachelor's degree program, School of Engineering
• Master's degree program, Graduate School of Engineering
• Doctoral (PhD) degree program, Graduate School of Engineering
• Professional degree program, Graduate School of Public Policy

Research activity information

• Dec. 2014, ITSシンポジウム2014 ベストポスター賞
  吉井 稔雄
• Aug. 2014, 交通工学研究発表会 泉賞
  吉井 稔雄
• Aug. 2014, 交通工学研究発表会研究奨励賞
  吉井 稔雄
• May 2011, 交通工学研究技術賞 交差点記号化標識ココマーク
  吉井 稔雄
• Nov. 2007, 交通工学研究発表会研究奨励賞
  吉井 稔雄

• Preliminary Analysis of Wind and Traffic Flow Conditions on Intercity Expressways
  YABATA Shinichiro; TSUBOTA Takahiro; YOSHII Toshio; XING Jian; KURAUCHI Shinya
  JSTE Journal of Traffic Engineering, 12, 4, A_1, A_9, Japan Society of Traffic Engineers, 01 Apr. 2026
  Japanese, This study integrates ten years of traffic flow data at 4.7 KP on the inbound Tomei Expressway with wind observations from the Kawasaki viaduct meteorological station, focusing on wind components aligned with the driving direction (headwind, tailwind, crosswind). To isolate wind effects, the dataset was limited to conditions without rainfall, daytime hours (07:00–16:00), and non-congested flow with average speeds of at least 60 km/h. Wind-speed-classified Q–V diagrams were first used to capture visual tendencies, followed by year-by-year and traffic-flow-ranked (200 vehicles/h intervals) correlation analyses between wind speed and average speed. The results indicate that headwinds tend to produce band-shaped reductions in speed levels and show predominantly negative correlations, consistent with increased aerodynamic resistance. Tailwinds exhibited slight speed increases, with correlations that varied by year and were often positive with average speed. Crosswinds, although expected to exert limited influence on longitudinal speed, revealed weak but generally positive correlations. These findings provide empirical evidence of the distinct effects of wind components on expressway traffic flow.
• Driving Simulator-Based Evaluation of Vehicle Speed Reduction Due to Traffic Control Facilities
  HIDA Akira; YOSHII Toshio; KURAUCHI Shinya
  JSTE Journal of Traffic Engineering, 12, 4, A_54, A_60, Japan Society of Traffic Engineers, 01 Apr. 2026
  Japanese, This study focuses on energy-free traffic control facilities, such as roundabouts, two-stage pedestrian crossings, and unsignalized pedestrian crossings. It aims to evaluate the impact of installing these physical facilities on driver's behavior especially regarding their speed. To achieve this, a series of experiments were conducted using a driving simulator. The virtual driving courses were designed to simulate a main road passing through a rural village, with the traffic control facilities placed at the village entrance and within the residential area. The experimental results show that the installation of a roundabout or two-stage pedestrian crossings at the entrance, as well as the installation of two-stage crossings within the village, leads to a statistically significant decrease in vehicle speeds. Furthermore, when traffic control facilities are installed in combination both at the village entrance and within the village, the speed-reducing effect was found to be limited depending on the distance between the installations.
• 運搬排雪・拡幅除雪が冬期の幹線道路における交通流状態に与える影響
  Feb. 2025
• プローブ旅行時間に基づくスプリット逐次更新信号制御
  Jan. 2025
• 任意観測データを用いた道路施設の生存関数のノンパラメトリック推定
  2025
• A Note on LSTM-based Prediction of Road Surface Condition Using Spatial Direction Series Data.
  Sho Takahashi; Kota Uenishi; Masahiro Yagi; Toru Hagiwara; Toshio Yoshii
  13th IEEE Global Conference on Consumer Electronics(GCCE), 375, 376, IEEE, 2024
  International conference proceedings
• Effectiveness of Accident Risk Information Based on Information Types
  2024
• Appropriate Traffic Safety Measures for Traffic Conditions with High Accident Risk
  2024
• Vertification of the effect of nighttime lighting on driver alertness
  IMAI Ryosuke; YOSHII Toshio; KURAUCHI Shinya; SHIRAYANAGI Hirotoshi
  Proceedings of the Conference of Japan Society of Traffic Engineers, 44, 267, 272, Japan Society of Traffic Engineers, 2024
  Japanese, 本研究では，夜間において，横断歩行者の出現に備えた安全運転を促す事故対策，ならびにドライバーによる早期の歩行者認知を支援するための事故対策を考案し，屋外実証実験によりその有効性を検証する．具体的には光を使用したライトアップによる事故対策として，プロジェクションマッピング投影による事故対策およびスポットライト点灯による事故対策を提案し，それらが車両挙動に与える影響を調べた．分析の結果，スポットライトセンサー点灯は早期のブレーキ動作を促進し，ドライバーによる早期の歩行者認知を支援する，プロジェクションマッピング投影は低速での走行を促すことが示された．
• プローブ旅行時間を用いた信号交差点アプローチの交通流状態判別手法
  髙田 啓介; 吉井 稔雄; 坪田 隆宏
  交通工学研究発表会論文集, 43, 487, 492, 2023, [Peer-reviewed]
• IMPACT ON LOW-RISK ROUTE CHOICE BEHAVIOR BY USING COMMUNICATION METHOD ABOUT TRAFFIC ACCIDENT RISK
  AHN Yoongho; NISHIUCHI Hiroaki; KURAUCHI Shinya; YOSHII Toshio; SANO Kazushi; DAITO Takehiko
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 78, 5, I_939, I_949, Japan Society of Civil Engineers, 2023
  Japanese, The objective of this study is to analyze the change in cognition and understanding about “Traffic accident risk” and the behavioral intensions change for safe driving by providing the driver with traffic accident risk information. In this study, in order to grasp changes of cognition and understanding about the concept of “Traffic accident risk” and the applicability of traffic accident risk information, multiple communication experiments about traffic accident risk information were conducted. After analyzing changes in cognition and behavioral intentions regarding traffic accident risk information in each experiment, long-term changes in cognition and behavioral intentions regarding traffic accident risk information were shown by comparing results of two experiments. In addition to that, the route choice experiment providing traffic risk information were conducted before and after provision communication information regarding traffic accident risk and the effects of communication on low accident risk route choice behavior were analyzed. It was found that subjects of experiments who correctly perceived “the relationship of the traffic accident risk between roads and highways” increased by communication and subjects who want to use the low accident risk route increased either. As shown results of route choice model providing traffic accident risk information, communications about traffic accident risk information provision affected low accident risk route choice behavior positively.
• Appropriate Traffic Safety Measures for Traffic Conditions with High Accident Risk
  Yoshitomo Orino; Toshio Yoshii; Takahiro Tsubota; Ryo Katsumura
  Journal of the Eastern Asia Society for Transportation Studies, 2023, [Peer-reviewed]
  English, Scientific journal
• Effectiveness of Accident Risk Information Based on Information Types
  Takahiro TSUBOTA; Toshio YOSHII; Shinya KURAUCHI; Jian XING
  Journal of the Eastern Asia Society for Transportation Studies, 2023, [Peer-reviewed]
  English, Scientific journal
• A method for discriminating the states of signal intersection using probe travel time
  ZHANG Yuchen; YOSHII Toshio; TSUBOTA Takahiro
  Proceedings of the Conference of Japan Society of Traffic Engineers, 42, 579, 584, Japan Society of Traffic Engineers, 2022, [Peer-reviewed]
  Japanese, Scientific journal, 本研究は，新しい信号制御方式の開発支援を目的として，信号交差点交通状態を 4 つの状態に分類して定義し，プローブ旅行時間を用いてリアルタイムで交通状態を判別する手法を考案する．具体的には，交差点流出方向の先詰まり有無と各現示の飽和状態を判定して，信号交差点交通状態を判別するアルゴリズムを考案する.また，実観測データに基づいてプローブ旅行時間に基づく先詰まり有無判定方法の精度を検証した結果，交差点によってその精度が大きく異なった．精度に影響を与える要因を検討するとともに，判定に用いる閾値の適切な設定方法を検討することが今後の課題である．
• A Method for Detecting the Appearance of Macroscopic Congested State based on the Area Traffic State
  TAKATA Keisuke; MORIMOTOTO Yuji; YOSHII Toshio; TSUBOTA Takahiro
  Proceedings of the Conference of Japan Society of Traffic Engineers, 42, 519, 522, Japan Society of Traffic Engineers, 2022, [Peer-reviewed]
  Japanese, Scientific journal, グリッドロック現象などに起因して道路ネットワーク交通処理能力が低下する巨視的渋滞は，ひとたび発生するとその社会的損失が著しく増加する．これを回避するためには，巨視的渋滞の発生を事前に予測し適切な交通制御を実施する必要があり，同予測を行うためには，過去の巨視的渋滞発生状況を把握することが必要となる．そこで本研究では，交通流状態を巨視的に捉えるエリア交通流状態を用いて，巨視的渋滞発生の有無を検出する手法を考案する．具体的には，プローブデータを用いて算定されるエリア交通流状態の時間推移をクラスター分析することで，特定の道路ネットワークエリア，特定の観測日における巨視的渋滞発生の有無を判定する手法を考案した．
• AN ANALYSIS OF TRAFFIC ACCIDENT RISKS ON RESIDENTIAL STREETS CONSIDERING THE VISIBILITY OF INTERSECTION
  Toshio YOSHII; Toru KAWAMOTO; Hirotoshi SHIRAYANAGI; Takahiro TSUBOTA
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 77, 5, I_1093, I_1099, Japan Society of Civil Engineers, 2022, [Lead author]
  Japanese, Scientific journal, The accident risk on residential roads is higher than that of highways. Especially, the intersections on the residential roads are more dangerous because of the large number of accidents. Therefore, in order to identify the factors affecting the number of accidents per unit traffic volume (hereafter, "traffic accident risk") at the intersections, this study makes a factor analysis for the intersections in Matsuyama metropolitan area. Since there are a lot of intersections with blind corners, in addition to road structure etc. the visibility of the intersection is considered as a factor. Specifically, by combining probe data and traffic accident data, a multiple regression analysis is carried out, using the number of traffic accidents at the intersections in each area as the objective variable, and various factors including intersection visibility as explanatory variables. As a result, it is shown that the accident risk of the 4-way intersections increases where narrowed roads intersected and good and bad visible corners were mixed.
• EFFECT OF TRAFFIC ACCIDENT INFORMATION PROVISION ON EXPRESSWAY NETWORK CONSIDERING INFORMATION TYPES
  Takahiro TSUBOTA; Toshio YOSHII; Shinya KURAUCHI; Jian XING
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 77, 5, I_985, I_993, Japan Society of Civil Engineers, 2022, [Peer-reviewed]
  Scientific journal
• Analysis on the Structure of Consciousness of Drivers with Rejection of Expressway Usage Focusing on Attitudes toward Traffic Accident
  長坂奈月; 倉内慎也; 吉井稔雄; 白柳洋俊
  交通工学研究発表会論文集, 41, 39, 45, 交通工学研究会, Oct. 2021, [Peer-reviewed]
  Japanese, Scientific journal
• AIによる高速道路トンネル照明取付具の劣化診断手法の開発
  坪田隆宏; 楊宇; 吉井稔雄
  第2回AI・データサイエンスシンポジウム, Oct. 2021, [Peer-reviewed]
  Scientific journal
• 見通しを考慮した生活道路交差点における交通事故リスク分析
  川本透; 吉井稔雄; 白柳洋俊; 坪田隆宏
  第63回土木計画学研究発表会・春大会, May 2021
  Scientific journal
• AIを用いたトンネル照明灯具の劣化予測モデル
  奥村尚登; 坪田隆宏; 吉井稔雄
  令和3年度土木学会四国支部 第27回技術研究発表会, May 2021
  Scientific journal
• 交差点の見通しを考慮した生活道路における交通事故リスク要因分析
  新水衛; 吉井稔雄; 川本透; 伊藤怜那; 交差点の見通しを考慮した生活道路における交通事故リスク要因分析
  令和3年度土木学会四国支部 第27回技術研究発表会, May 2021
  Scientific journal
• ネットワーク交通流ブレイクダウン判定方法の構築，令和3年度土木学会四国支部
  森本裕治; 吉井稔雄; 坪田隆宏; 新井晴登
  令和3年度土木学会四国支部 第27回技術研究発表会, May 2021
  Scientific journal
• 交通事故発生による道路ネットワーク性能の動的変化解析手法
  奥原瑠依; 吉井稔雄; 坪田隆宏; 堀口睦美
  令和;年度土木学会四国支部;回技術研究発表会, May 2021
  Scientific journal
• コロナ対策と交通安全対策に関する意識の比較分析
  清広晃輝; 金子平; 吉井稔雄; 倉内慎也
  令和3年度土木学会四国支部 第27回技術研究発表会, May 2021
  Scientific journal
• An Analysis of the Impact of Attentional Momentum Effect on Driver’s Ability of Awareness During Night-time Driving
  Hirotoshi Shirayanagi; Toshio Yoshii; Shinya Kurauchi; Takahiro Tsubota
  International Journal of Intelligent Transportation Systems Research, 19, 1, 273, 283, Apr. 2021, [Peer-reviewed]
  English, Scientific journal
• Empirical Study on the Relationship between Accident Risk Information Attitude and Driver Safety Awareness by Accident Risk Information Provision Using Road Information Boards
  HYODO Satoshi; NISHIUCHI Hiroaki; KURAUCHI Shinya; YOSHII Toshio; DAITO Takehiko
  JSTE Journal of Traffic Engineering, 7, 2, A_175, A_184, Japan Society of Traffic Engineers, Feb. 2021, [Peer-reviewed]
  Japanese, Scientific journal, Accident risk communications including accident risk information provision are important approaches to raise a driver’s awareness of road traffic safety from a long-term perspective by providing the information via various information media. The objective of the study is to investigate the effects of accident risk information provision using road information boards. A questionnaire survey for a total of 681 drivers living in Ehime and Niigata prefecture. In this study, we examined whether accident risk information provision using road information boards contributes to improving accident risk information attitudes and driver safety awareness by using structural equation model. The results shows that individual information acquisition factors make effects on accident risk information attitude and driver’s awareness of road traffic safety. It also shows that the accident risk information attitude such as understanding level, convincing level and the driver’s awareness of road traffic safety improved the driver who received the accident risk information on the road information boards.
• 交通事故の影響による MFD 形状変化分析
  吉井稔雄; 奥原瑠依; 坪田隆宏
  交通工学論文集, 7, 2, A_175, A_184, Feb. 2021, [Peer-reviewed]
  Japanese, Scientific journal
• Analysis of driving characteristics and effectiveness in travel time savings by rat-runners
  LI Wenhao; KURAUCHI Shinya; YOSHII Toshio; TSUBOTA Takahiro
  JSTE Journal of Traffic Engineering, 7, 2, A_354, A_361, Japan Society of Traffic Engineers, Feb. 2021, [Peer-reviewed]
  Japanese, Scientific journal, In urban areas, many people drive into narrow roads without signal lights to avoid congestion on arterial roads. This is, however, a great danger to the residents as well as pedestrians and cyclists. To solve this "rat-run" problem, it is indispensable to develop the consciousness of rat-runners.
  
  To this end, we consider providing factual examples that the disadvantages of taking rat-tun outweigh the disadvantages. This study is based on Matsuyama City, Ehime Prefecture, While verifying the effect of shortening the required time by rat-running, it also analyzed the driving characteristics of vehicles taking rat-run. As a result, due to the waiting time when merging to the main road and the influence of the signal system control, the effect of shortening the time when taking a rat-run becomes smaller. Besides, while taking rat-run frequently, vehicle speed tends to increase significantly when there is more congestion.
• An Analysis of Effect of Lateral Viewing on Visual Perception of Road Space
  SHIRAYANAGI Hirotoshi; HAYASHI Shingo; KURAUCHI Shinya; YOSHII Toshio
  JSTE Journal of Traffic Engineering, 7, 2, A_119, A_125, Japan Society of Traffic Engineers, Feb. 2021, [Peer-reviewed]
  Japanese, Scientific journal, Lateral viewing where the directions of the head and eyes are different and the change of the lateral viewing with time interferes with attentive visual search performance because visual attention resources are divided and coordinated into head and eye directions. In this study, we hypothesize that lateral viewing and the change of the viewing affects the duration required for visual perception of road space. Specifically, we focus on the lateral viewing of pedestrians when they cross a road and analyze the effect of the lateral viewing and the change of the viewing on the search time for a target stimulus in the road space by conducting a visual search task. The results showed that the longer the time required to search time for target stimulus in the road space, the greater the lateral viewing and the greater the change of the lateral viewing with time. The results supported the above hypothesis.
• Effect of the Multicollinearity of Interaction Terms on the Performance of the ANN Model
  Celso Luis FERNANDO; Toshio YOSHII; Takahiro TSUBOTA; Hirotoshi SHIRAYANAGI
  Proceedings of the Eastern Asia Society for Transportation Studies, 2021, [Peer-reviewed]
  English, Scientific journal
• AN ANALYSIS OF THE EFFECT OF VISUAL LINKS TO THE RIVER ON ATTACHMENT TOWARD THE RIVER FOR THE DEVELOPMENT OF A SOCIETY WITH AWARENESS OF FLOOD DISASTER PREVENTION
  Megumi KAGAWA; Hirotoshi SHIRAYANAGI; Shinya KURAUCHI; Toshio YOSHII
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 76, 5, I_409, I_416, Japan Society of Civil Engineers, 2021, [Peer-reviewed]
  Scientific journal
• 交通事故対策実施時における社会的受容性向上のためのリスクコミュニケーション
  清広晃輝; 吉井稔雄; 倉内慎也; 堀口睦美
  第62回土木計画学研究発表会・秋大会, Nov. 2020
• 道路情報板による交通事故リスク情報提供の実施とドライバーの認知に関する基礎分析
  大藤武彦; 西内裕晶; 兵頭知; 倉内慎也; 吉井稔雄
  第62回土木計画学研究発表会・秋大会, Nov. 2020
  Scientific journal
• PREDICTION OF TRAFFIC ACCIDENT LIKELIHOOD ON INTERCITY EXPRESSWAY BY CONVOLUTIONAL NEURAL NETWORK
  Takahiro TSUBOTA; Toshio YOSHII; Jian XING
  Intelligence, Informatics and Infrastructure, 1, 1, 11, 17, Nov. 2020, [Peer-reviewed]
  English, Scientific journal
• 眼球角度の時間推移が空間認知機能に与える影響分析
  林信吾; 白柳洋俊; 倉内慎也; 吉井稔雄
  交通工学研究発表会論文集, 145, 151, Sep. 2020
  Japanese, Scientific journal
• 道路利用者の情報獲得量が事故リスク情報に対する態度や安全運転意識に与える影響構造に関する実証的研究
  兵頭知; 西内裕晶; 倉内慎也; 吉井稔雄; 大藤武彦
  第40回交通工学研究発表会論文集, 145, 151, Sep. 2020
  Japanese, Scientific journal
• CNNを用いた都市間高速道路の交通事故リスク予測モデル
  坪田隆宏; 吉井稔雄; Jian XING
  第40回交通工学研究発表会論文集, 153, 158, Sep. 2020
  Japanese, Scientific journal
• An Analysis of Driver's Exogenous Attention During Driving at Night by a Pre-cueing Task
  SHIRAYANAGI Hirotoshi; YOSHII Toshio; KURAUCHI Shinya; TSUBOTA Takahiro
  JSTE Journal of Traffic Engineering, 6, 2, A_175, A_182, Japan Society of Traffic Engineers, Jun. 2020, [Peer-reviewed]
  Japanese, Scientific journal,

  This study aims to demonstrate that driver's cognition during driving at night can be improved by attentional momentum effect. Driver's cognition of a target often delays due to inhibition of return, which is that exogenous attention is suppressed orienting toward previously inspected locations. Previous studies have suggested that attentional momentum effect relieves inhibition of return. It is considered that driver's exogenous attention tends to be located on roadside -stores with high-illumination intensity which could cause the inhibition of return resulting in the delay in cognition of a target. This study conducts a pre-cueing task based on dual task paradigm to show attentional momentum effect relieves inhibition of return during driving at night. The response time of the attentional momentum condition was observed to be shorter than the inhibition of return condition. This result suggested that attentional momentum effect led to improve the driver's cognition during driving at night.

• Effect of Accident Risk Information Provision to Traffic Accident Reduction
  TSUBOTA Takahiro; YOSHII Toshio; SHIRAYANAGI Hirotoshi; KURAUCHI Shinya
  JSTE Journal of Traffic Engineering, 6, 2, A_270, A_279, Japan Society of Traffic Engineers, Jun. 2020, [Peer-reviewed]
  Japanese, Scientific journal,

  Accident risk information system aims to reduce traffic accidents by navigating drivers to the routes with lower accident risk. This study quantitatively evaluates the effect of the accident risk information provision by utilizing a dynamic traffic simulation environment – SOUND. The simulation bed is constructed to model the wide-area road network of Matsuyama, Japan. Accident risk estimation models are embedded in the simulation to calculate the timedependent route cost considering the accident risk in addition to conventional cost terms such as travel time. The simulation estimates the traffic conditions when drivers acquire the accident risk information in their route choice. The effect of the information provision system is evaluated by comparing the expected number of accidents with and without the system. The results revealed that the drivers with accident risk information prefer to use routes with lower accident risk, and the total number of accidents could reduce by up to 4%.

• AIを用いたネットワーク交通流ブレイクダウン発現予測モデル
  森本裕治; 吉井稔雄; 坪田隆宏
  第61回土木計画学研究発表会・春大会, Jun. 2020
  Scientific journal
• CNNを用いた渋滞発生予測モデル
  道原侑也; 吉井稔雄; 坪田隆宏
  第61回土木計画学研究発表会・春大会, Jun. 2020
  Scientific journal
• 交通事故の影響によるMFD形状の変化に関する分析
  奥原瑠依; 吉井稔雄; 坪田隆宏; 尾高慎二
  令和;年度四国支部技術研究発表会, May 2020
  Scientific journal
• Effect of the additional input using a data mining technique on the interpretability of the deep neural network
  Fernando,Celso; Yoshii,Toshio; Tsubota,Takahiro; Shirayanagi,Hirotoshi
  令和2年度四国支部技術研究発表会, May 2020
  English, Scientific journal
• AIを用いたネットワーク交通流ブレイクダウン発現予測モデル
  森本裕治; 吉井稔雄; 坪田隆宏
  令和2年度四国支部技術研究発表会, May 2020
  Scientific journal
• 生活道路における交通安全施策に関する意識調査
  清広晃輝; 吉井稔雄; 倉内慎也; 堀口睦美
  令和2年度四国支部技術研究発表会, May 2020
  Scientific journal
• CNNを用いた首都高速道路の事故発生予測モデル
  新水衛; 吉井稔雄; 坪田隆宏
  令和2年度四国支部技術研究発表会, May 2020
  Scientific journal
• IMPACT ANALYSIS OF INFORMATION PROVISION ON ACCIDENT RISK TO ENHANCE THE ARTERIAL ROAD USAGE
  KURAUCHI Shinya; NISHIUCHI Hiroaki; YOSHII Toshio; DAITO Takehiko; OZAWA Yukiko
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 75, 6, I_463, I_473, Japan Society of Civil Engineers, Apr. 2020, [Peer-reviewed]
  Japanese, Scientific journal,

  According to the traffic accident statistics in Japan, accident occurrence rate for residential road is around 2.4 times higher than that for arterial road. Despite this fact, a certain level of drivers might recognize driving on arterial road as more dangerous, resulting in avoiding arterial road usage. Therefore, this research investigated the driver's perceptions toward traffic accident rate, and then analysed the impact of information provision related to traffic accident risk. The results showed that about 30% of respondents perceived accident occurrence rate for arterial road higher than that of residential road. In addition, providing accident risk information might have greater potential to enhance the arterial road usage through the correction of perception bias.

• UNDERSTANDING COGNITIVE BIAS PERCEPTIONSFOR TRAFFIC ACCIDENT RISK ON MATSUYAMA URBAN AREA CONSIDERING RESIDENTIAL STREET
  NISHIUCHI Hiroaki; KURAUCHI Shinya; YOSHII Toshio; DAITO Takehiko; OZAWA Yukiko
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 75, 6, I_667, I_674, Japan Society of Civil Engineers, Apr. 2020, [Peer-reviewed]
  Japanese, Scientific journal,

  This research analyzes the tendency of cognitive bias perceptions for traffic accident risk on the Matsuyama urban area considering residential street. This research conducted a questionnaire survey for the drivers living in Matsuyama city area to understand not only situation of residential street utilization, but also intention of main road and perception to traffic accident risk. It is to analyze how drivers recognize the traffic accident risk for both main road and residential street in Matsuyama city. The analysis results from questionnaire survey data describes that 40 – 50% of drivers currently recognized traffic accident risk which are risk to cause, risk of getting caught and fatal accident rate. In addition to that drivers who is thinking that they can avoid the risk to cause traffic accident on residential street and the risk of getting caught tends to overly evaluate sever accident rate on main road by examining estimated parameters from ordered response probit model.

• A PAVEMENT DETERIORATION FORECASTING MODEL IN EXPRESSWAYS USING DEEP LEARNING
  Shin HASHIMOTO; Toshio YOSHII; Takahiro TSUBOTA; Pang-jo CHUN
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 75, 6, I_547, I_554, Japan Society of Civil Engineers, Apr. 2020, [Peer-reviewed]
  Scientific journal
• 遅れ時間に基づく渋滞評価手法の提案－愛媛県をケーススタディとして－
  垣田友希; 吉井稔雄; 神野裕昭; 福田尊元
  交通工学論文集, 6, 2, B_61, B_69, Feb. 2020, [Peer-reviewed]
  Scientific journal
• 深層学習による首都高速道路の事故発生予測モデル
  森本祐治; 吉井稔雄; 坪田隆宏; 全邦釘
  第60回土木計画学研究発表会, Dec. 2019
  Scientific journal
• 交通流シミュレーションを用いた低事故リスク経路誘導効果の分析
  甲斐慎一朗; 大藤武彦; 高橋浩司; 吉井稔雄
  第60回土木計画学研究発表会, Dec. 2019
  Scientific journal
• 自動車交通事故に対する恐怖感に着目した経路選択意識構造の分析
  倉内慎也; 西内裕晶; 吉井稔雄
  第60回土木計画学研究発表会, Dec. 2019
  Scientific journal
• 一般街路における舗装材質を考慮した事故リスク分析
  坪田隆宏; 吉井稔雄; 白柳洋俊; 倉内慎也
  第60回土木計画学研究発表会, Dec. 2019
  Scientific journal
• 交通事故がCBD街路網のMFD形状に与える影響の分析
  尾高慎二; 吉井稔雄; 奥原瑠依; 神戸信人
  第60回土木計画学研究発表会, Dec. 2019
  Scientific journal
• Analysis of the Safety Performance of Drainage Pavement focusing on Pavement Age.
  Fernando, C; Yoshii, T; Tsubota, T; Shirayanagi, H
  Eastern Asia Society for Transportation Studies, 13, 2016, 2026, Dec. 2019, [Peer-reviewed]
  English, Scientific journal
• EFFECT OF PAVEMENT CONDITIONS ON ACCIDENT RISK IN RURAL EXPRESSWAYS
  Takahiro TSUBOTA; Toshio YOSHII; Hirotoshi SHIRAYANAGI; Shinya KURAUCHI
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 75, 5, I_1081, I_1087, Japan Society of Civil Engineers, Dec. 2019, [Peer-reviewed]
  Japanese, Scientific journal
• Effect of Attentional Disengagement on Driver Inattention While Driving on Expressway
  Hirotoshi SHIRAYANAGI; Shinya KURAUCHI; Takahiro TSUBOTA; Toshio YOSHII
  Journal of EASTS, Dec. 2019, [Peer-reviewed]
  English, Scientific journal
• CBD街路網を対象としたMFDの形状分析
  吉井稔雄; 坪田隆宏; Stephanie GITURU; 白柳洋俊
  第59回土木計画学研究発表会, Jun. 2019
  Scientific journal
• ディープラーニングを用いた高速道路の路面劣化予測モデル
  橋本申; 吉井稔雄; 坪田隆宏; 全邦釘
  第59回土木計画学研究発表会, Jun. 2019
  Scientific journal
• 松山外環状線整備による交通事故減少便益の定量評価
  坪田隆宏; 吉井稔雄; 倉内慎也; 白柳洋俊
  第59回土木計画学研究発表会, Jun. 2019
  Scientific journal
• Estimation of passengers' benefit accrued by expressway expansion using an integrated demand model
  NISHI Masahiro; KURAUCHI Shinya; YOSHII Toshio; TSUBOTA Takahiro
  JSTE Journal of Traffic Engineering, 5, 2, A_293, A_302, Japan Society of Traffic Engineers, Feb. 2019, [Peer-reviewed]
  Japanese, Scientific journal,

  This research estimated the passengers' benefit accrued by expressway expansion. An integrated travel demand model which is composed of mode choice, destination choice and trip generation model was developed in order to comprehensively assess the behavioral changes brought by expressway expansion. In addition, "travel time delay"was explicitly considered in the mode choice model as an indicator of travel time reliability. The result showed that the value of travel time reliability was around 40 times larger than that of travel time savings, and the amount of travel demands such as induced, transferred and shifted traffics would be too large to ignore even if the length of expressway expansion were relatively short distance. Also shown was that the passengers' benefit attributed to those demand accounts for approximately half of overall benefit. These results indicate that the current evaluation method based on the road network assignment model with fixed demand might seriously underestimate the passengers'benefit accrued by expressway expansions and mislead the policy decision to postpone them.

• 交通流状態と幾何構造を考慮した都市間高速道路の事故発生リスク分析
  坪田隆宏; 吉井稔雄; Jian Xing
  交通工学論文集, 5巻, 2号(特集号A), A_199, A_207, Feb. 2019, [Peer-reviewed]
  Japanese, Scientific journal
• Bluetooth検知技術を活用した交通量推定
  坪田隆宏; 吉井稔雄; 白柳洋俊; 藤井浩史
  土木学会論文集 D3（土木計画学）, 74巻, 5号, I_1283, I_1289, Jan. 2019, [Peer-reviewed]
  Japanese, Scientific journal
• 長時間連続運転車両が事故発生リスクに与える影響分析
  坪田隆宏; 吉井稔雄; 白柳洋俊; 小倉晃一
  土木学会論文集 D3（土木計画学）, 74巻, 5号, I_1275, I_1282, Jan. 2019, [Peer-reviewed]
  Japanese, Scientific journal
• ETC2.0データを活用した生活道路の交通事故リスク要因分析
  坪田隆宏; 吉井稔雄; 倉内慎也; 山本篤志
  土木学会論文集 D3（土木計画学）, 74巻, 5号, I_1029, I_1035, Jan. 2019, [Peer-reviewed]
  Japanese, Scientific journal
• 生活道路交差点部と単路部における事故リスクの算定
  吉井稔雄; 坪田隆弘; 倉内慎也; 白柳洋俊
  交通工学研究発表会論文集, 38, 43, 48, Aug. 2018
  Scientific journal
• まちなか回遊時の記憶痕跡が主観的時間の歪みに与える影響
  大田菜央; 白柳洋俊; 倉内慎也; 坪田隆宏; 吉井稔雄
  第57回土木計画学研究発表会（土木計画学研究・講演集（CD-ROM）, 57, Jun. 2018
  Japanese, Scientific journal
• An estimation method of traffic accident risk on residential road using the ETC2.0 probe
  尾高 慎二; 吉井 稔雄; 神戸 信人
  交通工学研究発表会論文集, 4, A_246, A_251, 交通工学研究会, Feb. 2018, [Peer-reviewed]
  Japanese, Scientific journal
• 生活道路単路部における事故 リスク推定モデルの構築
  小川晃一; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 57, 2018
  Japanese, Scientific journal
• 交差点における事故リスク推 定モデルの構築
  岡田洋晃; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 57, 2018
  Japanese, Scientific journal
• An analysis of the effect of road pavement materials and their ages on the accident risk on Hanshin Expressway
  Celso Fernando; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 57, 2018
  English, Scientific journal
• Effect of Road Pavement Ages on Traffic Accident Risks
  Takahiro Tsubota; Celso Fernando; Toshio Yoshii; Hirotoshi Shirayanagi
  Transportation Research Procedia, Vol.34, 211, 218, 2018
  English, Scientific journal
• Effect of Pavement Conditions on Accident Risk in Rural Expressways.
  Takahiro Tsubota; Toshio Yoshii; Hirotoshi Shirayanagi; Shinya Kurauchi
  The 21st IEEE International Conference on Intelligent Transportation Systems (IEEE ITSC 2018), 3613, 3618, IEEE, 2018
  English, International conference proceedings
• An analysis of attentional disengagement effect on driver’s cognition of road gradient at sag sections
  Hirotoshi SHIRAYANAGI; Toshio YOSHII; Satoshi HYODO
  Transportation Research Procedia, Vol.34, 44, 50, 2018, [Peer-reviewed]
  English, Scientific journal
• DEVELOPMENT OF INTEGRATED TRAFFIC DATABASE FOR TRAFFIC ACCIDENT RISK INFORMATION PROVISION IN NIIGATA URBAN AREA AND ANALYSIS ON ROUTE CHOICE BEHAVIOR BASED ON STATED PREFERENCE SURVEY
  NISHIUCHI Hiroaki; YOSHII Toshio; KURAUCHI Shinya; DAITO Takehiko; ICHIKAWA Nobuyuki
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 74, 5, I_1419, I_1428, Japan Society of Civil Engineers, 2018, [Peer-reviewed]
  Japanese, Scientific journal, This paper describes development of integrated traffic data base for traffic accident risk information provision on Niigata urban area road network. By cooperations of the Niigata National Highway Office, East Nippon Expressway Company and Niigata Police Agency, detector data, traffic accident records and road geometric design data and weather data has been integrated to be possible to compare the accident risk characteristics between different road types. Characteristics of traffic accident risk by several factors in study site has been analyzed. Results of the analysis quantitatively showed accident risk on expressway is much lower than other arterial road including Niigata-Shinshin bypass road. The analysis also showed that traffic congestion and weather condition (rain and snow fall) affect to occur higher accident risk traffic situation. In addition to that, stated preference survey designed based on actual situation of traffic accident risk on Niigata urban area is conducted to analyze route choice behavior of the driver in the study site. Binomial logit model that is driver choose expressway or arterial road in the study site is applied. Model parameter estimation results showed us that drivers tends to choose the lower accident risk road if the accident risk information is provided. Especially emphasized information such as accident risk on the road is ten times higher than the other road is preferred compared to numerical information. Moreover authors confirmed that estimated model can install into traffic simulation to evaluate traffic condition under traffic accident risk information provision, and discuss how to implement proposed traffic accident risk management schemes in the Niigata urban area.
• ANALYSIS ON PERCEPTIONS OF ACCIDENT OCCURRENCE RATE AND SEVERE ACCIDENT RATE AND THEIR EFFECTS ON THE FREQUENCY OF EXPRESSWAY USAGE
  KURAUCHI Shinya; OHYAMA Takashi; YOSHII Toshio; SHIRAYANAGI Hirotoshi
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 74, 5, I_871, I_878, Japan Society of Civil Engineers, 2018, [Peer-reviewed]
  Japanese, Scientific journal, According to the traffic accident statistics in Japan, accident occurrence rate for expressway is around 10 times lower than that for ordinary road, and severe accident rates for both roads are at the same levels. Despite these statistics, a certain level of drivers might recognize expressway driving as more dangerous, resulting in avoiding expressway usage. Therefore, this research investigated the driver's perceptions toward traffic accident rate and severe accident rate based on a small-scale questionnaire survey for road users in Shikoku region. The results showed that about 20% of respondents perceived accident occurrence rate for expressway higher than that of ordinary road, and around 90% of respondents answered that severe accident rate for expressway is higher than that of ordinary road. In addition, the effects of these perceptions on the frequency of expressway usage was analysed using covariance structure model. The result showed that these perception biases would significantly decrease the frequency of expressway usage, and their impacts might be unignorable compared to those of travel time and expressway toll.
• 四国地域における社会基盤メンテナンスエキスパートの養成
  山本 浩司; 森脇 亮; 全 邦釘; 吉井 稔雄; 森 伸一郎
  土木学会論文集F4, 74, 4, I_85, I_94, 2018, [Peer-reviewed]
  Japanese, Scientific journal
• A Study on Driver's Stopping Behavior Focusing on Change of Positive Reinforcer and Generalization
  SHIRAYANAGI Hirotoshi; TAJI Shun; TSUBOTA Takahiro; KURAUCHI Shinya; YOSHII Toshio
  JSTE Journal of Traffic Engineering, 4, 1, A_106, A_112, Japan Society of Traffic Engineers, 2018, [Peer-reviewed]
  Japanese, Scientific journal,

  This study investigates the relationship between driving experience and generalization of driver's stopping behavior. Previous research has suggested that an acquired behavior is triggered by positive reinforcement, and the same behavior is replicated by the same trigger in any situations once it is generalized. Driving behavior is a type of acquired behaviors, and therefore it is possible that a procedure in driving is generalized by accumulating driving experience. This study aims to relate the generalization of driver's stopping behavior to the driver's driving experience by comparing the stopping behavior in real space and virtual space presented by a driving simulator. The results showed that drivers with longer driving experience performed stopping behavior based on the same positive reinforcement regardless of the situations: real space or virtual space, which suggests that their stopping behavior is generalized. On the other hand, drivers with shorter driving experience did not exhibit the generalization in their behavior.

• Speed Estimation Model for Signalised Arterials based on Aggregated QV Relationships
  TSUBOTA Takahiro; YOSHII Toshio; HARADA Hiro; JINNO Hiroaki
  JSTE Journal of Traffic Engineering, 4, 1, A_216, A_222, Japan Society of Traffic Engineers, 2018
  Japanese, Scientific journal,

  This study aims to develop an average travel speed estimation model for signalised arterials based on the relationship between flow (Q) and speed (V). Such relationship, or the QV relationship, describes the travel speed at given flow levels, which plays crucial role in designing traffic management schemes to evaluate the traffic performance after devising the policies. On the other hand, in the state of the practice, the QV relationship of signalised arterials only relates the daily traffic volume and daily average travel speed, which is unable to capture the dynamic changes in traffic, and therefore, hinders the proper evaluation of traffic performance after the policies. This study developed the methodology to estimate the QV relationship of signalised arterials using traffic data aggregated in smaller time intervals (e.g., 15 minutes). The proposed QV relationship relates the space-mean flow and speed along a corridor by utilising multiple detectors. The travel speed estimation model was developed based on a multiple linear regression model, which defined the average travel speed using the space-mean flow, road geometry and time of day. The model exhibited sound accuracy with R² of 0.77, and revealed the impact of road geometry and temporal difference on travel speed.

• An estimation method of traffic accident risk on residential road using the ETC2.0 probe
  ODAKA Shinji; YOSHII Toshio; KANBE Nobuto
  JSTE Journal of Traffic Engineering, 4, 1, A_246, A_251, Japan Society of Traffic Engineers, 2018
  Japanese, Scientific journal,

  Implement traffic management which encourages traffic shift from a high risk route to a low risk route in the view of spatially and temporally with understanding the probability of accidents in the road network (referred to as "accident risk"). It can reduce the number of traffic accidents. However, accident risk in expressways and arterial roads can be calculated from the problem of acquiring traffic flow data by sensors, On the other hand, accident risk calculation on specific residential roads was difficult. In this research, using the ETC 2.0 data which is becoming popular in recent years, we propose a method to estimate the distance that ETC2.0 vehicles running of residential roads. Furthermore, accident risk of residential roads is analyzed based on the distance that ETC2.0 vehicles running estimated by the same method for actual road network in Matsuyama metropolitan area. As a result, the accident risk becomes high in the narrow road width road.

• An analysis of Traveler's Evaluation frame toward public transport focusing on dynamic nature of reference point
  Sarif; Shinya Kurauchi; Toshio Yoshii
  International Journal on Advanced Science, Engineering and Information Technology, 8, 1, 205, 211, Insight Society, 2018, [Peer-reviewed]
  English, Scientific journal
• Study of density over time by several approaches using individual and sample data in the mixed traffic
  Fadly Arirja Gani; Toshio Yoshii; Shinya Kurauchi
  International Journal on Advanced Science, Engineering and Information Technology, 8, 1, 68, 77, 2018, [Peer-reviewed]
  English, Scientific journal
• Investigation of the Effects of Traffic Safety and In-vehicle Criminality on Commuter’s Mode Choice Behaviour
  Audinda Virsa Leinia; Takahiro Tsubota; Toshio Yoshii
  Internet Journal of Society for Social Management Systems, 11, 1, 136, 145, Dec. 2017, [Peer-reviewed]
  English, Scientific journal
• The Suitable Index of Flow and Density in the Mixed Traffic
  Fadly Arirja Gani; Toshio Yoshii; Shinya Kurauchi
  IOP Conference Series: Earth and Environmental Science, 71, 1, Institute of Physics Publishing, 20 Jun. 2017, [Peer-reviewed]
  English, International conference proceedings
• Development of discrete choice model considering internal reference points and their effects in travel mode choice context
  Sarif; Shinya Kurauchi; Toshio Yoshii
  IOP Conference Series: Earth and Environmental Science, 71, 1, Institute of Physics Publishing, 20 Jun. 2017, [Peer-reviewed]
  English, International conference proceedings
• An analysis of the impact of driving time on the driver's behavior using probe car data
  Satoshi Hyodo; Tohio Yoshii; Matstushita Satoshi; Shirayanagi Hirotoshi
  Transportation Research Procedia, 21, 169, 179, Elsevier B.V., 2017, [Peer-reviewed]
  English, International conference proceedings
• 事故率と重大事故率の知覚に着目した高
  倉内慎也; 大山貴志; 吉井稔雄; 白柳洋俊
  土木計画学研究・講演集 Vol.55（CD-ROM）, 2017
  Symposium
• SP調査による新潟都市圏道路網における 交通事故リスク情報提供時の経路選択行動分析
  西内裕晶; 吉井稔雄; 倉内慎也; 大藤武彦; 市川暢之
  土木計画学研究・講演集 Vol.56（CD-ROM）, 2017
  Scientific journal
• Speed Estimation Model for Signalised Arterials based on Aggregated QV Relationships
  坪田 隆宏; 吉井 稔雄; 原田 日郎; 神野 裕昭
  交通工学研究発表会論文集, 37, 87, 92, 交通工学研究会, 2017, [Peer-reviewed]
  Japanese, Scientific journal
• A Study on Driver's Stopping Behavior Focusing on Generalization
  白柳 洋俊; 坪田 隆宏; 倉内 慎也; 吉井 稔雄; 田地 竣
  交通工学研究発表会論文集, 37, 163, 166, 交通工学研究会, 2017
  Japanese, Scientific journal
• A STUDY ON REGIONAL DIFFERENCE OF REAR-END COLLISION ACCIDENT RISK ON THE HIGHWAYS CONSIDERING THE LAND USES
  HYODO Satoshi; YOSHII Toshio; SHIBASAKI Hiromu
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 73, 5, I_1201, I_1209, Japan Society of Civil Engineers, 2017
  Japanese, This study makes a factor analysis of the traffic accident risk in 2 regions, Tokyo and Ehime prefecture. Comparison analyses of the factors are carried out considering the land uses, which affect the rear-end collision accident risk. Region, land use, hourly traffic volume and road structure are considered as the factors, Poisson regression analysis and Negative Binomial regression analysis are carried out using the Road Traffic Census in 2010 and the traffic accident records in 3 years from 2012 to 2014. As a result, it is shown that the impacts of some same factors in Tokyo and Ehime are significantly differential effect of factors. For example, the rear-end collision accident risk can be increased when the level of traffic volume is highest (more than 800 vehicles/h/lane) at DID district in Ehime prefecture, and the traffic accident risk at DID district in Tokyo is decreased at the same level as the hourly traffic volume. On the other hand, the traffic accident risk at DID district in Tokyo is increased as the density of signalized intersection increase and the traffic accident risk at the other district in Ehime prefecture can be increased in accordance with the number of signalized intersection per kilometer increased.
• An Analysis of the Detection Probability of MAC Address from a Moving Bluetooth Device
  Takahiro Tsubota; Toshio Yoshii
  Transportation Research Procedia, 21, 251, 256, Elsevier B.V., 2017, [Peer-reviewed]
  English, International conference proceedings
• The Analysis of Attentional Disengagement Effect on Driver's Cognition of Road Gradient at Sag Sections
  SHIRAYANAGI Hirotoshi; YOSHII Toshio; HYODO Satoshi; WATANABE Shunichi
  JSTE Journal of Traffic Engineering, 3, 2, A_109, A_115, Japan Society of Traffic Engineers, 2017, [Peer-reviewed]
  Japanese, Scientific journal,

  This study investigates the effect on vigilance decrement on driver's cognition of road gradient at sag sections. Previous research has suggested that traffic congestion at sag sections was dependent upon that the deceleration of the vehicle driven without notice the change in road gradient at sag section propagates to followers. In psychology, persons miss recognizing the change in the target over time because of vigilance decrement, that is deterioration in the ability to remain attention for change of target over time and it is effective to avoid to maintain attention over prolonged periods time in order to reduce vigilance decrement. Therefore, the purpose of this study was to examine whether the disengagement of attention to a particular field improve the cognition of change in road gradient based on selective adaptation task. As the result, in the reaction time indicated the smoothness of the cognitive process, it was possible that attentional disengagement was caused the reduction of vigilance decrement. These results suggested that it led to improve the driver's cognition of road gradient to disengage attention in proper time.

• Modelling the Detection Probability of the MAC Address from a Moving Bluetooth Device considering Characteristics and Positions of the Scanner
  TSUBOTA Takahiro; YOSHII Toshio; FUJII Hiroshi; KAWANO Yuna
  JSTE Journal of Traffic Engineering, 3, 2, A_37, A_43, Japan Society of Traffic Engineers, 2017, [Peer-reviewed]
  Japanese, Scientific journal, Traffic monitoring using Bluetooth MAC addresses has been intensively studied for a decade. Nevertheless, estimation of Origin-Destination volume is still challenging, because the detection probability is unstable and sensitive to the installation positions and environments. With the aim to reveal the factors affecting the detection probability of MAC addresses, this study conducted a series of driving tests to collect detection samples from moving Bluetooth device under various scenarios. The data was then fed in a Logistic Regression Model to estimate the contribution of the factors, such as the installation positions of the scanner and the driving speed of the experiment car, to the detection probability. The results agreed on the significance of distance and angle between the scanner and the car, as well as the car speed, as reported in preceding studies. This study further identified the contribution of driving direction and timeout duration of the scanner. The proposed model successfully estimated the detection probability with a reasonable accuracy.
• サグ認知における注意の解放効果
  白柳洋俊; 吉井稔雄; 兵頭知
  交通工学研究発表会論文集(CD-ROM), 36th, ROMBUNNO.52, 328, 交通工学研究会, Aug. 2016, [Peer-reviewed]
  Japanese, Symposium
• The Suitable Measure of Flow and Concentration in the Mixed Traffic
  Fadly Arirja Gani; Toshio Yoshii; Shinya Kurauchi
  2nd International Conference on Transdiciplinary Research of Environmental Problems in Southeast Asia (TREPSEA) 2016, Jun. 2016
  English, Symposium
• 新潟市内道路網における交通事故発生リスク情報提供に向けた統合データベースの構築とその活用
  西内裕晶; 吉井稔雄; 大藤武彦; 小澤友記子; 塩見康博
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.21‐09, May 2016
  Japanese
• 首都高速道路における大規模イベント開催時を対象とした集計QKを用いた流入制御に関する研究
  稲富貴久; 割田博; 桑原雅夫; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.09‐07, May 2016
  Japanese
• 沿道状況に着目した主要道路における事故リスク分析
  兵頭知; 吉井稔雄; 柴崎宏武; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.21‐05, May 2016
  Japanese
• 連続運転時間が運転挙動に与える影響分析
  兵頭知; 吉井稔雄; 松下聖史; 大宮清英
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.09‐08, May 2016
  Japanese
• 生活道路における交通事故リスクに関する基礎的研究
  尾高慎二; 吉井稔雄; 神戸信人
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.21‐04, May 2016
  Japanese
• 四国の高速道路ネットワークの延伸が物流に及ぼす影響の基礎的分析
  倉内慎也; 吉井稔雄; 横地和彦
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.43‐02, May 2016
  Japanese
• 事故リスク情報提供による社会的便益に関する考察
  吉井稔雄; 倉内慎也; 白柳洋俊; 村上和宏
  土木計画学研究・講演集(CD-ROM), 53, ROMBUNNO.21‐01, May 2016
  Japanese
• 店舗ファサードの新奇性による主観的時間の歪み
  白柳洋俊; 吉井稔雄; 山本祥大
  日本都市計画学会中四国支部研究発表会講演集, Apr. 2016
  Japanese
• 都市における最適な車両台数に関する考察
  吉井 稔雄
  都市計画研究講演集, 1, 6, Apr. 2016, [Invited]
  Japanese, Scientific journal
• AN ANALYSIS OF THE IMPACT OF HOURLY TRAFFIC VOLUME ON TRAFFIC ACCIDENT RISK ON CENSUS HIGHWAYS
  HYODO Satoshi; YOSHII Toshio
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 72, 5, I_1283, I_1291, Japan Society of Civil Engineers, 2016
  Japanese, Traffic accident risk must be changed depend on the time of day. It is important to understand this effect on traffic accident risk. In order to carry out effective safety measures, this study investigates the relationship between accident risk and the time of day. After the traffic accident risk of several accident types are calculated based on the hourly traffic volume observed by the census, Poisson regression model is applied to them to investigate the impact of the hourly traffic volume, land use and road structures on the traffic accident risk. As a result, it is shown that the hourly traffic volume has significant impact on the accident risk of all accident types, and the impacts are different tendencies among the 4 accident types. As for the right/left turn accident and the crossing collision, both of the accident risks take the highest value at the certain level of traffic volume. About the rear-ender collision, it tends to increase as the hourly traffic volume increases. On the other hand, about the single vehicle accident, it tends to decrease as the hourly traffic volume increases.
• AN EXAMINATION OF THE ACCIDENT RISK UNIT ON NATIONAL HIGHWAYS
  HYODO Satoshi; YOSHII Toshio; KURAUCHI Shinya
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 72, 5, I_1293, I_1299, Japan Society of Civil Engineers, 2016
  Japanese, Recently, the accident rates per vehicle-kilometers is generally used as the likelihood of accident occurrence evaluation unit. The evaluation unit is considered to be proper for a traffic accident on the controlled- access roads such as expressways. On the other hand, it is assumed that the traffic accident on the highways which have intersections are occurred more frequently when the driver passes through an intersection than passing through a basic road section. Therefore, the number of times of passing intersections is considered to be more proper as the evaluation unit than the vehicle-kilometer of travel. In this study, in order to consider the evaluation unit as the accident risk on the highways, a comparative analysis has been conducted to understand how the relationship between vehicle-kilometers and the number of times of passing intersections affect the accidents on highways. As the result of comparative analysis, it shows that the number of times of passing intersections has a strong impact on the multi-vehicle accident and collision of vehicle with pedestrian than the vehicle-kilometer of travel. On the other hand, the vehicle-kilometer of travel has more impact on the single-vehicle accident the number of times of passing intersections.
• Modelling the Chance of Detecting the MAC Address from a Moving Bluetooth Device considering Characteristics and Positions of the Scanner
  坪田隆宏; 藤井浩史; 吉井稔雄; 河野侑奈
  交通工学研究発表会論文集(CD-ROM), 36, 111, 115, 交通工学研究会, 2016
  Japanese
• 交通工学,これまでの50年,これからの50年 交通安全
  日野泰雄; 西田泰; 西田泰; 浜岡秀勝; 吉井稔雄; 田中淳
  交通工学, 51, 1, 44, 49, 交通工学研究会 ; [1966]-, Jan. 2016, [Invited]
  Japanese, Scientific journal
• Identification of factors that may affect the discharge flow at a bottleneck
  Daisuke Yamaguchi; Takashi Okano; Hajime Sudo; Masahiko Kobayashi; Takayuki Ogihara; Norihiro Izumi; Atsushi Tanaka; Toshio Yoshii
  INTERNATIONAL SYMPOSIUM ON ENHANCING HIGHWAY PERFORMANCE (ISEHP), (7TH INTERNATIONAL SYMPOSIUM ON HIGHWAY CAPACITY AND QUALITY OF SERVICE, 3RD INTERNATIONAL SYMPOSIUM ON FREEWAY AND TOLLWAY OPERATIONS), 15, 356, 365, 2016, [Peer-reviewed]
  English, International conference proceedings
• 交通流状態に着目した日仏高速道路における事故発生リスクの比較分析
  兵頭知; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 36th, ROMBUNNO.35, 222, 交通工学研究会, 2016, [Peer-reviewed]
  Japanese, Symposium
• AN ACCIDENT RISK ANALYSIS AT TRAVELING ON EXPRESSWAYS FOCUSED ON THE TRANSITION OF BRIGHTNESS
  兵頭知; 吉井稔雄; 高山雄貴
  土木学会論文集 D3(土木計画学)(Web), 7, 5, I-1027, I-1033, Dec. 2015, [Peer-reviewed]
  Japanese, Scientific journal
• A RESEARCH ON DEMAND FORECASTING OF EMERGENCY LIFE-SAVING TRANSFER
  片岡源宗; 吉井稔雄; 二神透; 大口敬
  土木学会論文集 D3(土木計画学)(Web), 7, 5, I-407, I-414, Dec. 2015, [Peer-reviewed]
  Japanese, Scientific journal
• 高速道路における休憩行動が走行挙動に及ぼす影響の分析
  兵頭 知; 吉井稔雄; 大宮清英; 松下聖史
  第13回ITSシンポジウム2015, Dec. 2015, [Peer-reviewed]
  Symposium
• 高速道路走行時における主観的時間の遷移
  白柳洋俊; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 52, ROMBUNNO.158, Nov. 2015
  Japanese, Scientific journal
• アンケート調査データに基づく松山自動車道利用者の休憩施設選択行動の分析
  山田隆広; 倉内慎也; 吉井稔雄; 永井基博
  土木計画学研究・講演集(CD-ROM), 52, ROMBUNNO.174, Nov. 2015
  Japanese, Scientific journal
• Bluetooth通信を用いた一般道における交通流動分析データ構築手法に関する研究
  尾高慎二; 吉井稔雄; 倉内慎也; 神戸信人
  土木計画学研究・講演集(CD-ROM), 52, ROMBUNNO.126, Nov. 2015
  Japanese, Scientific journal
• Bluetoothスキャナを用いたMACアドレス観測によるOD交通量推定手法
  吉井稔雄; 西内裕晶; 塩見康博; 尾高慎二; 倉内慎也
  土木計画学研究・講演集(CD-ROM), 52, ROMBUNNO.240, Nov. 2015
  Japanese, Scientific journal
• 時間帯の違いに着目した一般道路における事故リスク分析
  兵頭知; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 52, ROMBUNNO.252, Nov. 2015
  Japanese, Scientific journal
• Analysis of the impact of the traffic states on traffic accident risk
  Satoshi HYODO; Toshio YOSHII
  Proceedings of 22st World Congress on Intelligent Transportation Systems, Oct. 2015, [Peer-reviewed]
  English, International conference proceedings
• Impact study of various information about accident risk on driver’s route choice behavior
  Shinya KURAUCHI; Toshio YOSHII; Satoshi HYODO
  6th International Symposium on Transportation Network Reliability, Aug. 2015, [Peer-reviewed]
  English, International conference proceedings
• ショックウェーブに着目した事故発生リスク分析
  兵頭知; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 35th, ROMBUNNO.49, 313, 交通工学研究会, Aug. 2015, [Peer-reviewed]
  Japanese
• 地区交通における高齢者事故に関する統計分析
  吉井稔雄; 倉内慎也; 兵頭知; 佐川奈緒
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.190, Jun. 2015
  Japanese, Scientific journal
• 首都高速道路における複数エリアを対象とした集計QKを用いた流入制御に関する研究
  割田博; 桑原雅夫; 吉井稔雄; 稲富貴久
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.214, Jun. 2015
  Japanese, Scientific journal
• Bluetooth通信を用いた一般道における交通流計測の適用可能性の研究
  尾高慎二; 吉井稔雄; 倉内慎也; 神戸信人
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.174, Jun. 2015
  Japanese, Scientific journal
• 待ち行列モデルを用いた救急救命搬送サービスの分析
  澤井友貴; 片岡源宗; 吉井稔雄; 二神透
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.273, Jun. 2015
  Japanese, Scientific journal
• プローブデータを用いた高速道路における走行挙動と事故リスクの関係分析
  倉内慎也; 吉井稔雄; 兵頭知; 大西邦晃; 永井基博
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.212, Jun. 2015
  Japanese
• 交通事故リスクの認知バイアスに関する研究
  大山貴志; 倉内慎也; 吉井稔雄; 大西邦晃; 美濃雄介
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.285, Jun. 2015
  Japanese
• 一般道路における事故リスク原単位の検討
  兵頭知; 吉井稔雄; 倉内慎也
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.276, Jun. 2015
  Japanese, Scientific journal
• ベイジアンネットワークを用いた首都高速道路におけるマクロ交通状態量の変化に関する分析
  西内裕晶; 吉井稔雄; 割田博; 稲富貴久; 田村勇二
  土木計画学研究・講演集(CD-ROM), 51, ROMBUNNO.213, Jun. 2015
  Japanese
• 高速道路利用時の休憩施設選択行動の分析
  山田隆広; 倉内慎也; 吉井稔雄; 永井基博
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• 交通事故リスクの認知状況に関する基礎的分析
  大山貴志; 倉内慎也; 吉井稔雄; 美濃雄介
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• 地区交通における高齢者事故に関する統計分析
  吉井稔雄; 倉内慎也; 兵頭知; 佐川奈緒
  第51回土木計画学研究発表会・講演集, May 2015
  Scientific journal
• 事故リスク情報が高速道路利用者の出発時刻選択に及ぼす影響の分析
  村上和宏; 倉内慎也; 吉井稔雄
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• プローブデータを用いた高速道路における走行挙動と事故リスク分析
  神垣裕輝; 福本大介; 吉井稔雄; 大西邦晃
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• 渋滞末尾に着目した事故リスク分析
  兵頭知; 吉井稔雄; 倉内慎也
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• Bluetooth 通信を活用した交通観測手法の基礎的分析
  安原弘貴; 倉内慎也; 吉井稔雄; 尾高慎二
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• 一般道路における事故リスク原単位の検討
  兵頭知; 吉井稔雄; 倉内慎也; 松田健右
  平成27年度四国支部技術研究発表会, May 2015
  Scientific journal
• Concept on risk and continuation of the technologies
  吉井 稔雄
  高速道路と自動車 = Expressways and automobiles, 58, 4, 7, 10, 高速道路調査会, Apr. 2015
  Japanese
• ANALYSIS ON DIRECTIVITY OF MAC ADDRESS DETECTION FOR COLLECTING MOBILE DATA
  NISHIUCHI Hiroaki; SHIOMI Yasuhiro; KURAUCHI Shinya; YOSHII Toshio; SUGA Yoshiki
  Journal of Japan Society of Civil Engineers, Ser. F3 (Civil Engineering Informatics), 71, 2, I_40, I_46, Japan Society of Civil Engineers, 2015
  Japanese,  Development of traffic flow monitoring technology is required at areas where are not enough equipped traffic sensor infrastructure such as Asian countries and rural cities in Japan. Data collection from vehicles having smart phone and car navigation system has attracted attention to be one of the solution for those issues since these devices are installed Bluetooth devices that has unique MAC address, and matching of MAC address can collect traffic state data such as travel time, OD traffic volume and so on. However details of characteristics of MAC address data detection have not yet known to use for traffic state analysis. Therefore this research analyzes MAC address data detection rate from Bluetooth devices focusing on the distance and angle between MAC address scanner and transmitters. In addition, difference of setting way (horizontally and vertically placed) of MAC address scanner is also considered to analyze MAC address detection rate. Experiment results shows detection rate changed by distance, angle and setting way of MAC address scanner, and detection rate is significantly different by difference of those factors. Therefore hypothesis of this study what MAC address scanner has directivity to detect MAC address from Bluetooth devices has been supported statistically. And its results also showed importance of considering directivity for data collection from vehicles installing Bluetooth devices.
• Development of monitoring method for traffic condition based on cross-sectional MAC address collection
  高倉功; 塩見康博; 西内裕晶; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 35, 245, 251, 交通工学研究会, 2015
  Japanese
• Proposal rules to identify bottlenecks by using private probe data
  垣田 友希; 吉井 稔雄; 高井 健一; 神野 裕昭
  交通工学研究発表会論文集, 35, 259, 264, 交通工学研究会, 2015
  Japanese
• プローブデータを用いた松山自動車道の事故多発区間の交通流分析
  平賀典生; 吉井稔雄
  日本道路会議論文集(CD-ROM), 31st, ROMBUNNO.1050, 2015
  Japanese
• DEVELOPMENT OF A MODEL OF THE TRANSPORTATION TIME SENT TO A HOSPITAL BY AMBURANCE
  KATAOKA Motomune; YOSHII Toshio; FUTAGAMI Toru; OGUCHI Takashi
  SEISAN KENKYU, 67, 2, 137, 142, Institute of Industrial Science The University of Tokyo, 2015
  Japanese, Emergency transportation service can take emergency patients to hospitals, which is one of the most important governmental services. Now in Japan, the population is decreases and the demand of the calls for ambulance is predicted to increase. Therefore, it is requested that we make the service as efficient as possible and we have an appropriate scheme from mid and long-term perspectives how the degree of the level of service should be kept. This research investigates the actual status of the service towards its effective operation. In this paper, the transportation time is divided into 5 stages, time for order, preparation, arrival, staying, sending. Then, estimation models of the required time of these 5 stages are constructed, and the models are applied to the current service provided in Matsuyama-city. As a result, it is shown that these 5 models can estimate these times with sufficient accuracy.
• ANALYSIS ON DIRECTIVITY OF MAC ADDRESS DETECTION FOR COLLECTING MOBILE DATA
  NISHIUCHI Hiroaki; SHIOMI Yasuhiro; KURAUCHI Shinya; YOSHII Toshio; SUGA Yoshiki
  Journal of Japan Society of Civil Engineers, Ser. F3 (Civil Engineering Informatics), 71, 2, I_40, I_46, Japan Society of Civil Engineers, 2015, [Peer-reviewed]
  Japanese, Scientific journal,  Development of traffic flow monitoring technology is required at areas where are not enough equipped traffic sensor infrastructure such as Asian countries and rural cities in Japan. Data collection from vehicles having smart phone and car navigation system has attracted attention to be one of the solution for those issues since these devices are installed Bluetooth devices that has unique MAC address, and matching of MAC address can collect traffic state data such as travel time, OD traffic volume and so on. However details of characteristics of MAC address data detection have not yet known to use for traffic state analysis. Therefore this research analyzes MAC address data detection rate from Bluetooth devices focusing on the distance and angle between MAC address scanner and transmitters. In addition, difference of setting way (horizontally and vertically placed) of MAC address scanner is also considered to analyze MAC address detection rate. Experiment results shows detection rate changed by distance, angle and setting way of MAC address scanner, and detection rate is significantly different by difference of those factors. Therefore hypothesis of this study what MAC address scanner has directivity to detect MAC address from Bluetooth devices has been supported statistically. And its results also showed importance of considering directivity for data collection from vehicles installing Bluetooth devices.
• Mode Classification for Mixed Traffic Flow Based on Smartphone Data
  Yasuhiro Shiomi; Hiroaki Nisuhichi; Toshio Yoshii
  Journal of the Eastern Asia Society for Transportation Studies, 11, 1970, 1981, 2015, [Peer-reviewed]
  English, Scientific journal
• スマートフォンの所持形態を考慮した二輪車・四輪車の車種判別に関する研究
  塩見康博; 西内裕晶; 吉井稔雄
  第12回ITSシンポジウム Peer-Review Proceedings, Dec. 2014
• 複数エリアに着目した集計QK関係を用いたエリア流入制御の適用に関する研究
  稲富貴久; 割田博; 桑原雅夫; 吉井稔雄
  第12回ITSシンポジウム, Dec. 2014
  Japanese, Research society
• 救急救命搬送システム評価方法の検討
  片岡源宗; 吉井稔雄; 二神透; 大口敬
  土木計画学研究・講演集(CD-ROM), 50, ROMBUNNO.229, Nov. 2014
  Japanese
• 明るさの変化に着目した高速道路走行時の事故発生リスク分析
  兵頭知; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 50, ROMBUNNO.173, Nov. 2014
  Japanese
• 交通事故ハザード評価法の新規開発と個人対応型対策の実証的研究
  朴啓彰; 熊谷靖彦; 吉井稔雄; 大田学; 阿部玲佳; 永原三博; 片岡源宗
  交通工学, 49, 4, JISHUKENKYU,4-7, Oct. 2014, [Peer-reviewed]
  Japanese
• Area Traffic Control using The Macroscopic Fundamental Diagram
  Toshio Yoshii
  1st International Conference of Transdisciplinary Research on Environmental Problem in Southeastern Asia(TREPSEA), Sep. 2014
  English, Symposium
• The Relationship of Financial Requirement to the Driver’s Behavior in the Public Transport Service (Case Study: Makassar Public Transportation)
  Hajriyanti Yatmar; Hiroki Kamigaki; Shinya Kurauchi; Toshio Yoshii
  1st International Conference of Transdisciplinary Research on Environmental Problem in Southeastern Asia(TREPSEA), Sep. 2014
  English, Symposium
• ポアソン回帰モデルによる高速道路における交通事故発生リスク要因分析
  兵頭知; 吉井稔雄; 高山雄貴
  交通工学研究発表会論文集(CD-ROM), 34, 93, 99, 交通工学研究会, Aug. 2014
  Japanese
• 首都高速道路におけるピーク時間帯の需要抑制による日渋滞量の低減可能性
  南航太; 割田博; 山口大輔; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 34th, ROMBUNNO.38, 230, 交通工学研究会, Aug. 2014, [Peer-reviewed]
  Japanese
• Impacts of Transition of the Traffic States on Traffic Accident Risk
  Toshio Yoshii; Satoshi Hyodo; Yuki Takayama
  ISTS&IWTDCS 2014, Jun. 2014
  English, Symposium
• ショックウェーブを考慮した事故リスク分析
  兵頭知; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 49, ROMBUNNO.37, Jun. 2014
  Japanese
• 事故リスク情報がドライバーの選択行動に与える影響に関する研究
  村上和宏; 倉内慎也; 吉井稔雄; 大西邦晃; 川原洋一; 高山雄貴; 兵頭知
  土木計画学研究・講演集(CD-ROM), 49, ROMBUNNO.102, Jun. 2014
  Japanese
• MFDを用いた流入制御手法に関する研究
  前原慎也; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 49, ROMBUNNO.212, Jun. 2014
  Japanese
• 首都高速道路における集計QKを用いたエリア流入制御の適用に関する研究
  割田博; 桑原雅夫; 吉井稔雄; 稲富貴久
  土木計画学研究・講演集(CD-ROM), 49, ROMBUNNO.211, Jun. 2014
  Japanese
• Symbolized intersection sign "Co Co Mark"
  Toshio Yoshii
  Journal of Light and Visual Environment, 38, 145, 148, The Illuminating Engineering Institute of Japan, 05 May 2014, [Peer-reviewed]
  English, Scientific journal
• 混合交通流における交通流解析
  神垣裕輝; 吉井稔雄; 高山雄貴
  平成26年度四国支部技術研究発表会, May 2014
  Japanese, Symposium
• Special section on dynamic traffic assignment: A tool for evaluating and assessing dynamic traffic management schemes
  Fumitaka Kurauchi; Toshio Yoshii
  Journal of Intelligent Transportation Systems: Technology, Planning, and Operations, 18, 2, 175, 176, 03 Apr. 2014, [Peer-reviewed]
  English, Scientific journal
• An Analysis of the Cyclist's Driving Behavior under the Influence of Alcohol
  吉井 稔雄; 高山 雄貴
  交通工学 = Traffic engineering, 49, 2, 51, 60, 交通工学研究会 ; [1966]-, Apr. 2014
  Japanese
• Impact of the traffic states on accident risk on urban expressway
  Satoshi Hyodo; Toshio Yoshii
  Proceedings of the 19th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2014 - Transportation and Infrastructure, 509, 516, 01 Jan. 2014
  English, International conference proceedings
• AN ACCIDENT RISK ANALYSIS FOCUSING ON Q-K STATE USING 5 MINUTES' DATA
  HYODO Satoshi; YOSHII Toshio; TAKAYAMA Yuki
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 70, 5, I_1127, I_1134, Japan Society of Civil Engineers, 2014
  Japanese, In addition to free flow state and congested flow state, this study establishes the third phase of mixed flow state based on the q-k state using 5 minutes data, and carried out a comparative analysis, which investigates an impact of the three phases of traffic states on traffic accident risk. Firstly, in order to consider difference in the process of mixed flow state, this study analyzed the differences between the traffic accident risk on two-lane expressway and four-lane expressway. After, focused on an impact of a heterogeneous mixed flow state that appear when free flow state and congested flow state are mixed in space on accident risk, the relationship between the traffic states on each lane and traffic accident risk were analyzed. Using the accident record and the observed traffic data, this study analyzed the accident risk on the Hanshin Expressway network. As a result, it is shown that the accident risks of rear-ender collision and minor collision tend to be higher in the homogeneous congested flow comparing to ones in the heterogeneous mixed flow.
• 救急救命搬送サービス時間に関する研究
  片岡源宗; 吉井稔雄; 二神透; 大口敬
  土木計画学研究・講演集(CD-ROM), 48, ROMBUNNO.115, Nov. 2013
  Japanese
• 救急救命搬送要請頻度に関する分析
  片岡源宗; 吉井稔雄; 二神透; 大口敬
  土木計画学研究・講演集(CD-ROM), 48, ROMBUNNO.5, Nov. 2013
  Japanese
• 時間集積の経済・不経済を考慮した始業時刻選択モデル
  高山雄貴; 松岡香織; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 33rd, ROMBUNNO.55, Sep. 2013, [Peer-reviewed]
  Japanese
• 首都高速3号渋谷線下りにおける渋滞現象の分析と渋滞対策の取組み
  増田智志; 岡野孝司; 泉典宏; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 33rd, ROMBUNNO.23, 127, 交通工学研究会, Sep. 2013, [Peer-reviewed]
  Japanese
• 高速道路における交通事故発生リスク情報の提供に関する研究
  吉井稔雄; 川原洋一; 大石和弘; 兵頭知
  交通工学研究発表会論文集(CD-ROM), 33rd, ROMBUNNO.61, Sep. 2013, [Peer-reviewed]
  Japanese
• 高速道路における交通事故発生リスク情報の提供に関する研究 (第33回交通工学研究発表会論文集)
  吉井 稔雄; 川原 洋一; 大石 和弘
  交通工学研究発表会論文集, 33, 335, 340, 交通工学研究会, Sep. 2013
  Japanese
• 時間集積の経済・不経済を考慮した始業時刻選択モデル (第33回交通工学研究発表会論文集)
  高山 雄貴; 松岡 香織; 吉井 稔雄
  交通工学研究発表会論文集, 33, 295, 300, 交通工学研究会, Sep. 2013
  Japanese
• 車両検知器の5分間データを利用した交通流状態別事故発生リスク分析
  兵頭知; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 47, ROMBUNNO.313, Jun. 2013
  Japanese
• 集積の経済を考慮したSCGEモデルにおける地域細分化の影響評価
  麻生雅之; 高山雄貴; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 47, ROMBUNNO.213, Jun. 2013
  Japanese
• ガソリン税制に対するメンタル・アカウンティングの基礎的分析
  倉内慎也; 前川朝尚; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 47, ROMBUNNO.114, Jun. 2013
  Japanese
• 東南アジア諸都市への導入に適した集計QK制御の考案
  吉井稔雄; 前原慎也; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 47, ROMBUNNO.128, Jun. 2013
  Japanese
• DEVELOPMENT OF A TRAFFIC ACCIDENT SIMULATION MODEL ON URBAN EXPRESSWAY NETWORKS
  Toshio Yoshii; Yuki Takayama
  OPTIMUM 2013 – International Symposium on Recent Advances in Transport Modelling, Apr. 2013
  English, Symposium
• A FEASIBILITY STUDY OF AN AREA TRAFFIC CONTROL METHOD FOR TOKYO METROPOLITAN EXPRESSWAYS BASED ON MACROSCOPIC FUNDAMENTAL DIAGRAM
  Takahisa INATOMI; Hiroshi WARITA; Takashi OKANO; Takahiro TSUBOTA; Toshio YOSHII; Masao KUWAHARA
  OPTIMUM2013 - International Symposium on Recent Advances of Transport Modeling, Apr. 2013, [Peer-reviewed]
  English, International conference proceedings
• VERIFICATION ANALYSIS OF A RAMP METERING CONTROL STRATEGY USING THE MACROSCOPIC FUNDAMENTAL DIAGRAM
  YOSHII Toshio; TAKAYAMA Yuki; MATSUMOTO Yosuke
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 69, 5, I_579, I_586, Japan Society of Civil Engineers, 2013
  Japanese, This study makes verification analysis of a ramp metering control strategy using Macroscopic Funda-mental Diagram. One of the greatest advantages of the control is that the control can be operated without OD information. In this analysis, the driver's route choice behavior model is constructed, in which they choose their route, expressway or arterial. Then, applying a simulation model with the route choice model to an actual expressway network and an actual OD demand, the analysis has been done. The results show that operation of the control has benefits to improve the traffic states on expressway and to increase in-flow traffic. In other words, it is shown that the traffic flows not only on expressway but also on arterial could be improved by operating the proposed metering control.
• BIFURCATION ANALYSIS OF AN ECONOMIC GEOGRAPHY MODEL WITH A TRANSPORT SECTOR
  TAKAYAMA Yuki; YAMAMOTO Takaya; YOSHII Toshio
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 69, 5, I_327, I_333, Japan Society of Civil Engineers, 2013
  Japanese, In this paper, weinvestigate the effect of transport market structure on the distribution of economic activity. To achieve this purpose, we extend an economic geography model developed by Thisse⁸⁾ in order to incorporate the transport sector. Analysis of this model shows that if the carriers' entry is free, agglomeration of economic activity increases price competition among carriers that fosters further agglomeration. By contrast, if entry is regulated, the agglomeration increases the carriers' market power. Consequently, entry regulation in the transport sector may lead to the collapse of the agglomeration.
• ANALYSIS ON THE CAR OWNER'S INTENTION TOWARD CAR SHARING SERVICE IN THE PROVINCIAL CAPITAL CITY
  KURAUCHI Shinya; ISHIMURA Tatsunori; YOSHII Toshio
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 69, 5, I_423, I_431, Japan Society of Civil Engineers, 2013
  Japanese, This research analysed the car owner's intention toward car sharing service in the provincial capital city. An in-depth interview survey was conducted in Matsuyama city to investigate the car usage, perception of the monetary cost related to car usage, perception of the existing car sharing service, and intention toward the hypothetical car sharing services. The results showed that the majority of car owners had not considered the overall cost related to car usage and they tend to overestimate it. Such respondents stated relatively high intention toward the car sharing service compared to the ones who underestimate the overall cost related to car usage. Also, it seems to be very important for the penetration of car sharing system to introduce a service which would reduce the user's anxiety about the availability of the service.
• 都市内高速道路における交通流状態領域別車線数別事故発生リスク
  兵頭知; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 46, ROMBUNNO.107, Nov. 2012
  Japanese
• 集計QKを利用したランプ流入制御手法の有効性評価
  吉井稔雄; 松本洋輔; 高山雄貴; 前原慎也
  土木計画学研究・講演集(CD-ROM), 46, ROMBUNNO.230, Nov. 2012
  Japanese
• Transport market structure effect on economic geography
  Yuki Takayama; Toshio Yoshii
  1st European Symposium on Quantitative Methods in Transportation Systems, Sep. 2012, [Peer-reviewed]
• 都市内高速道路における多車線道路区間を考慮した交通流領域別事故発生リスク要因分析
  兵頭知; 吉井稔雄; 高山雄貴
  交通工学研究発表会論文集(CD-ROM), 32nd, ROMBUNNO.19, Sep. 2012, [Peer-reviewed]
  Japanese
• An Area Ramp Metering Control Method using the Macroscopic Fundamental Diagram
  Toshio Yoshii
  Internal Seminar in the University of Sydney, Aug. 2012
  English, Symposium
• 暫定2車線道路区間における交通事故発生リスクに関する研究
  吉井稔雄
  高速道路と自動車, 55, 7, 45, 47, Jul. 2012, [Invited]
  Japanese
• 暫定2車線道路区間における交通事故発生リスクに関する研究 (平成23年度高速道路関連社会貢献協議会研究助成の概要(その1))
  吉井 稔雄
  高速道路と自動車, 55, 7, 45, 47, 高速道路調査会, Jul. 2012
  Japanese
• 全国大会会場における記号化標識の設置効果について
  吉井稔雄; 松平健
  土木計画学研究・講演集(CD-ROM), 45, ROMBUNNO.386, Jun. 2012
  Japanese
• 交通施策実施時の社会的便益評価
  麻生雅之; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 45, ROMBUNNO.390, Jun. 2012
  Japanese
• 輸送市場を考慮した都市集積モデルの分岐解析
  山本誠也; 高山雄貴; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 45, ROMBUNNO.167, Jun. 2012
  Japanese
• AN ANALYSIS OF THE TRAFFIC ACCIDENT RISK CONSIDERING THE MULTI-LANE ROAD SECTION IN URBAN EXPRESSWAY
  兵頭知; 吉井稔雄; 高山雄貴
  土木学会論文集 D3(土木計画学)(Web), 68, 5, I_1349, 1355, Japan Society of Civil Engineers, 2012, [Peer-reviewed]
  Japanese, This paper analyzes the traffic accident risk in urban expressway focusing on the traffic state and the number of road lanes. In the previous studies, regression analyses have been done to a two lane urban expressway. Then, the various factors, such as traffic flow state, road geometry and environment, have significant impacts on the occurrence of the 3 types of accident, rear-ender collision, minor collision and own-crash accident. In this study, using the accident report, traffic counts obtained by detectors, rain precipitation data and road geometry data on Hanshin Expressway during 3 years from 2006 to 2008, the differences between the traffic accident risk on two-lane expressway and multi-lane expressway are investigated. As a result, it is shown that the traffic accident risk on multi-lane expressway is higher than that of two-lane expressway, and the impacts of each factor on the risk are different between the two types of expressways.
• AN ANALYSIS OF THE TRAFFIC ACCIDENT RISK CONSIDERING THE MULTI-LANE ROAD SECTION IN URBAN EXPRESSWAY
  HYODO Satoshi; YOSHII Toshio; TAKAYAMA Yuki
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 68, 5, I_1349, I_1355, Japan Society of Civil Engineers, 2012
  Japanese, This paper analyzes the traffic accident risk in urban expressway focusing on the traffic state and the number of road lanes. In the previous studies, regression analyses have been done to a two lane urban expressway. Then, the various factors, such as traffic flow state, road geometry and environment, have significant impacts on the occurrence of the 3 types of accident, rear-ender collision, minor collision and own-crash accident. In this study, using the accident report, traffic counts obtained by detectors, rain precipitation data and road geometry data on Hanshin Expressway during 3 years from 2006 to 2008, the differences between the traffic accident risk on two-lane expressway and multi-lane expressway are investigated. As a result, it is shown that the traffic accident risk on multi-lane expressway is higher than that of two-lane expressway, and the impacts of each factor on the risk are different between the two types of expressways.
• 交通騒音が不快感及び集中力に与える影響の分析
  藥師神茂; 畝本真結; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.158, Nov. 2011
  Japanese
• 都市における自転車分担率に影響を与える要因に関する研究
  藤原磨名夢; 吉井稔雄; 倉内慎也
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.P47, Nov. 2011
  Japanese
• 支払い・報酬付与のタイミングに着目した公共交通運賃方式に関する基礎的考察
  倉内慎也; 佐藤仁美; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.280, Nov. 2011
  Japanese
• 事故リスク算定シミュレーションを用いたランプ流入制御実施効果分析
  松本洋輔; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.266, Nov. 2011
  Japanese
• 公共交通運賃に対するメンタル・アカウンティングの基礎的分析
  倉内慎也; 堀内彩未; 佐藤仁美; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.281, Nov. 2011
  Japanese
• 輸送密度の経済を考慮したCore‐Peripheryモデルの集積・分散パターン
  高山雄貴; 山本誠也; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.242, Nov. 2011
  Japanese
• 都市内高速道路における多車線道路区間を考慮した事故発生リスク要因分析
  兵頭知; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.147, Nov. 2011
  Japanese
• 心理的コストに着目したカーシェアリングに対する利用意向の分析
  石村龍則; 倉内慎也; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.108, Nov. 2011
  Japanese
• 幹線旅客を対象とした四国の交通需要予測モデルの構築
  麻生雅之; 吉井稔雄; 高山雄貴
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.61, Nov. 2011
  Japanese
• 高速道路料金に対する利用者の認知特性に関する基礎的分析
  藥師神司; 倉内慎也; 吉井稔雄; 縄稚奈緒美
  土木計画学研究・講演集(CD-ROM), 44, ROMBUNNO.255, Nov. 2011
  Japanese
• Platoon-based traffic flow model for estimating breakdown probability at single-lane expressway bottlenecks
  Yasuhiro Shiomi; Toshio Yoshii; Ryuichi Kitamura
  TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 45, 9, 1314, 1330, Nov. 2011, [Peer-reviewed]
  English, Scientific journal
• Discussion: Active work for developing safe and secure town: preparing for Tonankai and Nankai earthquake
  ADACHI Toshiyuki; JOKO Keiji; KASHIWADANI Masuo; SHIGEKAWA Kishie; YOSHII Toshio
  JSCE magazine, 96, 9, 16, 23, 土木学会, 15 Sep. 2011
  Japanese
• Impact of Traffic States on Traffic Accident Risk
  Toshio Yoshii
  2nd International Workshop on Traffic Data Collection & its Standardisation, Sep. 2011
  English, Symposium
• 都市内高速道路における事故発生リスク要因分析
  吉井稔雄; 兵頭知; 倉内慎也
  交通工学研究発表会論文集(CD-ROM), 31st, ROMBUNNO.19, 31 Aug. 2011
  Japanese
• 集計QKならびにローカルLPを組み合わせたランプメータリング制御の提案
  松本洋輔; 吉井稔雄
  交通工学研究発表会論文集(CD-ROM), 31st, ROMBUNNO.1, 31 Aug. 2011
  Japanese
• 四国における交通機関分担率推定モデルの構築
  高橋昌幸; 吉井稔雄; 山本誠也; 倉内慎也
  土木学会年次学術講演会講演概要集(CD-ROM), 66th, ROMBUNNO.IV-047, 05 Aug. 2011
  Japanese
• 都市内高速道路における交通事故発生リスクの要因分析
  兵頭知; 吉井稔雄; 倉内慎也
  土木学会年次学術講演会講演概要集(CD-ROM), 66th, ROMBUNNO.IV-203, 05 Aug. 2011
  Japanese
• 都市における自転車分担率に影響を与える要因に関する研究
  藤原磨名夢; 吉井稔雄; 麻生雅之; 倉内慎也
  土木学会年次学術講演会講演概要集(CD-ROM), 66th, ROMBUNNO.IV-273, 05 Aug. 2011
  Japanese
• 交通事故発生リスク算定シミュレーションの構築
  松本洋輔; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 66th, ROMBUNNO.IV-210, 05 Aug. 2011
  Japanese
• APPLICABILITY OF THE METHODOLOGY TO MATCH DISTRIBUTIONS OF HOUSEHOLD AND PERSON ATTRIBUTES IN THE GENERATION OF SYNTHETIC POPULATIONS BASED ON PERSON-TRIP SURVEY DATA
  倉内慎也; 萩尾龍彦; 石村龍則; 吉井稔雄
  Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management), 67, 5, 67_I_759, 67_I_767, Japan Society of Civil Engineers, 2011
  Japanese, This study investigated the applicability of iterative proportional updating (IPU) algorithm to calculate the weight for each sample case obtained from the disaggregate survey so as to match distributions of household and person attributes in the generation of synthetic populations. The large-scale person-trip survey data conducted in Matsuyama metropolitan area was empirically applied as the disaggregate data, and the results showed that the excessive categorization of attributes would produce large errors due to the lack of sample case, sometimes inducing the failure to calculate the weight. Although the integration of the attribute categories would alleviate above problems, the excessive integration might induce the loss of original information, that is, heterogeneity of the sample case, undermining the advantage of micro-simulation approaches. Therefore, the consideration of sampling scheme is very crucial for the application of IPU algorithm (e.g. setting the sampling ratio for each attribute categories according to the marginal distributions of the population).
• APPLICABILITY OF THE METHODOLOGY TO MATCH DISTRIBUTIONS OF HOUSEHOLD AND PERSON ATTRIBUTES IN THE GENERATION OF SYNTHETIC POPULATIONS BASED ON PERSON-TRIP SURVEY DATA
  倉内慎也; 萩尾龍彦; 石村龍則; 吉井稔雄
  土木計画学研究・論文集, 67, 5, I_759, 767, Japan Society of Civil Engineers, 2011, [Peer-reviewed]
  Japanese, This study investigated the applicability of iterative proportional updating (IPU) algorithm to calculate the weight for each sample case obtained from the disaggregate survey so as to match distributions of household and person attributes in the generation of synthetic populations. The large-scale person-trip survey data conducted in Matsuyama metropolitan area was empirically applied as the disaggregate data, and the results showed that the excessive categorization of attributes would produce large errors due to the lack of sample case, sometimes inducing the failure to calculate the weight. Although the integration of the attribute categories would alleviate above problems, the excessive integration might induce the loss of original information, that is, heterogeneity of the sample case, undermining the advantage of micro-simulation approaches. Therefore, the consideration of sampling scheme is very crucial for the application of IPU algorithm (e.g. setting the sampling ratio for each attribute categories according to the marginal distributions of the population).
• Platoon-Based Traffic Flow Model for Estimating Breakdown Probability at Single-Lane Expressway Bottlenecks
  Yasuhiro Shiomi; Toshio Yoshii; Ryuichi Kitamura
  PAPERS SELECTED FOR THE 19TH INTERNATIONAL SYMPOSIUM ON TRANSPORTATION AND TRAFFIC THEORY, 17, 591, 610, 2011, [Peer-reviewed]
  English, International conference proceedings
• 二輪車すり抜け走行に着目した事故発生件数と路肩幅員との相関分析
  吉井稔雄; 濱本敬治
  土木計画学研究・講演集(CD-ROM), 42, ROMBUNNO.P29, Nov. 2010
  Japanese
• 都市圏における自転車分担率に影響を与える要因に関する研究
  藤原磨名夢; 吉井稔雄; 倉内慎也
  土木計画学研究・講演集(CD-ROM), 42, ROMBUNNO.40, Nov. 2010
  Japanese
• ETC‐ODデータを用いた首都高速道路におけるランプ間OD交通量の変動特性分析
  西内裕晶; 吉井稔雄; 桑原雅夫; MISKA Marc; 割田博
  土木計画学研究・論文集, 27, 5, 941, 950, 30 Sep. 2010
  Japanese
• 環状ネットワークにおける集計QKを用いた流入制御の適応性
  遠藤皓亮; 吉井稔雄; 藤井聡
  交通工学研究発表会論文集(CD-ROM), 30th, ROMBUNNO.5, 01 Sep. 2010
  Japanese
• エントロピーが歩行挙動に与える影響分析
  谷上正晃; 吉井稔雄; 藤井聡
  交通工学研究発表会論文集(CD-ROM), 30th, ROMBUNNO.87, 348, 01 Sep. 2010
  Japanese
• 信号サイクル長がドライバー停止判断挙動に与える影響分析
  吉井稔雄; 山内麻希
  交通工学研究発表会論文集(CD-ROM), 30th, ROMBUNNO.11, 01 Sep. 2010
  Japanese
• Evaluation of an Area Metering Control Method Using the Macroscopic Fundamental Diagram
  Toshio Yoshii; Yuji Yonezawa; Ryuichi Kitamura
  The 12th World Conference on Transport Research, Jul. 2010
  English, Symposium
• Verification of the Area Ramp Metering Control Strategy Using Macroscopic Fundamental Diagram
  Toshio Yoshii; Kosuke Endo
  The Third International Symposium on Dynamic Traffic Assignment, Jul. 2010
  English, Symposium
• 交差点記号化標識の設置効果に関する研究
  吉井稔雄; 松平健
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.296, Jun. 2010
  Japanese
• 案内標識の問題点と記号化の必要性および今後の方向性
  松平健; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.295, Jun. 2010
  Japanese
• 路肩幅員に着目した二輪車のすり抜け挙動解析
  河西秀彦; 吉井稔雄; 藤井聡
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.110, Jun. 2010
  Japanese
• プローブデータを用いた飽和交通流率の推計手法
  和田沙織; 吉井稔雄; 花房比佐友; 堀口良太
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.146, Jun. 2010
  Japanese
• ネットワーク形状と交通状況に適応したランプ流入制御手法
  遠藤皓亮; 吉井稔雄; 藤井聡
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.156, Jun. 2010
  Japanese
• 記号化標識「ココ!マーク高知」の取り組み
  小松敏宏; 松浦由佳; 中島俊彦; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.297, Jun. 2010
  Japanese
• サイクル長に着目した信号現示切り替わり時における車両挙動の解析
  山内麻希; 吉井稔雄; 藤井聡
  土木計画学研究・講演集(CD-ROM), 41, ROMBUNNO.103, Jun. 2010
  Japanese
• 路線状道路ネットワークを対象とした集計QK流入制御の有効性検証
  遠藤皓亮; 吉井稔雄; 藤井聡
  土木学会関西支部年次学術講演会講演概要集(CD-ROM), 2010, ROMBUNNO.IV-15, 22 May 2010
  Japanese
• 標識・サイン 記号化標識~ココ!マーク高知~
  吉井稔雄; 松平健
  交通工学, 45, 3, 30-33,1(1), 49,図巻頭4p, 交通工学研究会, 01 May 2010
  Japanese
• Symbolized intersections: Co Co Mark Kochi
  吉井 稔雄; 松平 健
  Traffic engineering, 45, 3, 30, 33,図巻頭1p, 交通工学研究会, May 2010
  Japanese
• Information/Communication Technologies and Travel Behaviour
  Toshio Yoshii; Kuniaki Sasaki
  TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES, 18, 1, 1, 2, Feb. 2010, [Peer-reviewed]
  English, Scientific journal
• 右直混用レーンにおける右折可能交通容量
  吉井稔雄; 桑原雅夫
  交通工学, 45, 1, 68, 75, Jan. 2010
  Japanese
• 希望走行速度分布に基づく車群台数分布推定手法
  塩見康博; 吉井稔雄; 北村隆一
  交通工学, 45, 1, 58, 67, Jan. 2010
  Japanese
• The effect of the symbolization of intersections using alphabet signs
  KATAOKA MOTOMUNE; YOSHII TOSHIO; MATSUDAIRA KEN; OGUCHI TAKASHI; KUMAGAI YASUHIKO; NAKAJIMA TOSHIHIKO; KOMATSU TOSHIHIRO; MATSUURA YUKA
  Proceedings of the Japan Joint Automatic Control Conference, 53, 0, 313, 313, The Japan Joint Automatic Control Conference, 2010
  Japanese, 観光等で不慣れた地域を運転するドライバは，案内標識やカーナビ等を頼りに運転するとなるが，不慣れた地域故に，確信を持って，交差点を直進や右左折することが困難である．このような状況では，必要以上の減速や急ブレーキ，さらには脇見運転が起こりやすく，交通上望ましいとは言い難い．本稿では，これらの問題を改善すべく，新たな案内標識である交差点記号化標識について，走行実験やアンケート調査の結果を報告する．
• A study on the capacity of right turn traffic at a shared lane
  吉井 稔雄; 桑原 雅夫
  Traffic engineering, 45, 1, 68, 75, 交通工学研究会, Jan. 2010
  Japanese
• A method of estimating platoon size distribution based on desired speed distribution
  塩見 康博; 吉井 稔雄; 北村 隆一
  Traffic engineering, 45, 1, 58, 67, 交通工学研究会, Jan. 2010
  Japanese
• Analysis of driver's behavior at yellow signal in intersection
  Motomune Kataoka; Yukio Hashimoto; Yasuhiko Kumagai; Toshio Yoshii
  Intelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005, 7, 4424, 4430, 01 Dec. 2009
  English, Scientific journal
• A study of the signal control for the minimization of co2emission
  Hiroaki Nishiuchi; Toshio Yoshii
  Intelligent Transportation Society of America - 12th World Congress on Intelligent Transport Systems 2005, 6, 3375, 3384, 01 Dec. 2009
  English, Scientific journal
• 歩行者交通流におけるエントロピー増大傾向の検証
  谷上正晃; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 40, ROMBUNNO.46, Nov. 2009
  Japanese
• 車群交通流モデルによる高速道路単路部ボトルネック確率的交通容量推定手法の構築
  塩見康博; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 40, ROMBUNNO.57, Nov. 2009
  Japanese
• エントロピーを用いた歩行者交通流解析
  森田勝也; 吉井稔雄; 北村隆一
  交通工学研究発表会論文集(CD-ROM), 29th, ROMBUNNO.41, 164, Oct. 2009
  Japanese
• 都市内高速道路における集計QKエリア流入制御の実施効果検証
  米澤悠二; 吉井稔雄; 北村隆一
  交通工学研究発表会論文集(CD-ROM), 29th, ROMBUNNO.46, Oct. 2009
  Japanese
• 集計QKを用いたエリア流入制御の実施効果検証
  米澤悠二; 吉井稔雄; 北村隆一
  土木計画学研究・論文集, 26, 3, 561, 568, 30 Sep. 2009
  Japanese
• エントロピーを用いた歩行者交通流の状態記述方法
  森田勝也; 吉井稔雄; 北村隆一
  土木学会年次学術講演会講演概要集(CD-ROM), 64th, Disk 2, ROMBUNNO.IV-030, 03 Aug. 2009
  Japanese
• Platoon-based Traffic Flow Model to Estimate Stochastic Traffic Capacity on Freeway Bottlenecks
  Yasuhiro Shiomi; Toshio Yoshii; Ryuichi Kitamura
  2 nd International Symposium on Freeway and Tollway Operations, Jun. 2009
  English, Symposium
• An Evaluation of the Effect of the Area Traffic Control Method on Urban Freeway Networks Using the Macroscopic Fundamental Diagram
  Toshio Yoshii; Yuji Yonezawa; Ryuichi Kitamura
  2 nd International Symposium on Freeway and Tollway Operations, Jun. 2009
  English, Symposium
• 集計QKを用いたエリア流入制御の有効性に関する研究
  米澤悠二; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 39, ROMBUNNO.115, Jun. 2009
  Japanese
• 首都高速道路におけるランプ間OD交通量の独立性
  西内裕晶; 吉井稔雄; 桑原雅夫; MISKA Marc; 割田博
  土木計画学研究・講演集(CD-ROM), 39, ROMBUNNO.133, Jun. 2009
  Japanese
• 交差点記号化標識の配置記号決定プログラム開発
  吉井稔雄; 松平健
  土木計画学研究・講演集(CD-ROM), 39, ROMBUNNO.108, Jun. 2009
  Japanese
• 交差点記号化研究および高知における実地展開
  松平健; 吉井稔雄; 大口敬; 片岡源宗; 小松敏宏
  モバイル研究論文集, 2009, 133, 138, 17 Mar. 2009
  Japanese
• New roadsign system in Kochi
  松平 健; 吉井 稔雄; 大口 敬
  Proceedings of symposium on mobile interactions, 2009, 133, 138, モバイル学会, 2009
  Japanese
• 集計QKを用いたエリア流入制御の実施効果検証
  米澤悠二; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 38, ROMBUNNO.300, Nov. 2008
  Japanese
• 集針QKを用いたエリア流入制御手法
  吉井稔雄; 塩見康博; SON Xiaoxiao; 北村隆一
  土木計画学研究・講演集(CD-ROM), 37, ROMBUNNO.101, Jun. 2008
  Japanese
• A study on bottleneck capacity of two-lane expressways
  吉川 良一; 塩見 康博; 吉井 稔雄
  交通工学, 43, 5, 48, 58, 交通工学研究会, 2008
  Japanese
• 単純化ネットワークを用いた大規模道路ネットワーク交通シミュレーションモデルの構築
  森大祐; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 36, ROMBUNNO.48, Nov. 2007
  Japanese
• 車群台数と走行速度の観測に基づいた希望走行速度分布推定手法
  塩見康博; 吉井稔雄; 北村隆一
  交通工学研究発表会論文報告集, 27, 53, 56, 交通工学研究会, Oct. 2007
  Japanese
• 交差点記号化標識がカーナビ誘導利用時の運転者に与える影響の把握
  米澤悠二; 吉井稔雄; 北村隆一
  交通工学研究発表会論文報告集, 27, 5, 8, 交通工学研究会, Oct. 2007
  Japanese
• A METHOD OF ESTIMATING DESIRED SPEED DISTRIBUTION ON DIVIDED 2-LANE EXPRESSWAY
  Yasuhiro Shiomi; Toshio Yoshii; Ryuichi Kitamura
  TRANSPORTATION SYSTEMS: ENGINEERING & MANAGEMENT, 411, 420, 2007, [Peer-reviewed]
  English, International conference proceedings
• 交差点目印標識のグローバルデザインに関する研究
  松平健; 吉井稔雄; 大口敬; 根岸弘幸
  交通工学, 41, MEJIRUSHIHYOSHIKI,13-16, Oct. 2006
  Japanese
• 使いやすい高速道路を目指して 交通渋滞を解消する通行料金システム
  吉井稔雄
  交通工学, 41, 4, 8, 交通工学研究会, Oct. 2006
  Japanese
• 車群形成過程を再現するボトルネック容量推定シミュレーション
  塩見康博; 吉井稔雄; 北村隆一; 吉川良一
  交通工学研究発表会論文報告集, 26, 45, 48, 交通工学研究会, Oct. 2006
  Japanese
• 第1回 土木計画学公共政策デザインコンペ : 地域まちづくりデザイン : 明日の街。それは、君たちの中にある
  萩原 亨; 吉井 稔雄
  土木学会誌, 91, 9, 93, 94, 15 Sep. 2006
  Japanese
• 単純化ネットワークを用いた交通量配分手法に関する研究
  林裕真; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 33, ROMBUNNO.93, Jun. 2006
  Japanese
• 新しく提案する渋滞判定手法に基づいた渋滞発生確率推定モデルの構築
  塩見康博; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 33, ROMBUNNO.304, Jun. 2006
  Japanese
• Traffic Flow at the Bottleneck on Divided Two-Lane Expressway
  Yasuhiro Shiomi; Toshio Yoshii; Ryuichi Kitamura
  Proceedings of the 5th International Symposium on Highway Capacity and Quality of Service, 2, 359-367, 2006
  English, Scientific journal
• Development of a simplified network which represents all roadway links
  NAKAMURA Toshiyuki; YOSHII Toshio; KITAMURA Ryuichi
  INFRASTRUCTURE PLANNING REVIEW, 23, 23, 441, 446, Japan Society of Civil Engineers, 2006
  Japanese, This paper proposes the simplified network which consists of two types of links, one is “aggregate link” that represents many routes and mainly deals with streets, the other is“arterial link”that represents the road section and mainly indicates arterials. The simplified network can be formed with smaller number of links comparing to one including all roads, arterials and streets. Moreover, this paper shows the equivalence between the assignment on the simplified network and on the network of all roads on the assumption and using the special utility function in the route choice model. As for the assumption, the study is assuming that the cognitive travel time of all routes from Origin to Destination is the same within the streets area, which is surrounded by arterial links. On the other hand, the special utility function is adopted that can be divided into several road sections.
• 目印標識 交差点目印標識のグローバルデザインに関する研究 (自主研究活動報告)
  松平 健; 吉井 稔雄; 大口 敬
  交通工学, 41, 0, 巻末13, 16, 交通工学研究会, 2006
  Japanese
• 交通渋滞を解消する通行料金システム (特集 使いやすい高速道路を目指して)
  吉井 稔雄
  交通工学, 41, 0, 4, 8, 交通工学研究会, 2006
  Japanese
• 時間帯別料金割引施策実施時における経験情報の有無を考慮した出発時刻選択行動分析
  古川兼嗣; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 32, ROMBUNNO.198, Dec. 2005
  Japanese
• 全ての道路リンクに相当する単純化ネットワーク作成手法の構築
  中村俊之; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 32, ROMBUNNO.16, Dec. 2005
  Japanese
• 道路の多様な料金施策 阪神高速13号東大阪線における料金割引実証実験における通勤トリップの経路変更・利用時刻変更行動の分析
  大藤武彦; 吉田聡; 吉井稔雄; 北村一
  交通工学, 40, 6, 42, 51, Nov. 2005
  Japanese
• カーナビによる経路誘導を支援する交差点目印標識の設置効果把握実験
  中野光太郎; 吉井稔雄; 北村隆一
  交通工学研究発表会論文報告集, 25, 189, 192, 交通工学研究会, Oct. 2005
  Japanese
• 阪神高速13号東大阪線における料金割引実証調査‐通勤トリップの経路変更・利用時刻変更行動の分析‐
  土居聡; 吉田聡; 吉井稔雄; 大藤武彦
  交通工学研究発表会論文報告集, 25, 137, 140, 交通工学研究会, Oct. 2005
  Japanese
• 高速道路片側1車線区間におけるボトルネック現象に関する考察
  塩見康博; 吉井稔雄; 北村隆一; 吉川良一
  交通工学研究発表会論文報告集, 25, 25, 28, 交通工学研究会, Oct. 2005
  Japanese
• 単純化ネットワークを用いた経路選択モデルの構築と適用
  中村俊之; 吉井稔雄; 北村一
  土木学会年次学術講演会講演概要集(CD-ROM), 60th, Disk 2, ROMBUNNO.4-036, 20 Aug. 2005
  Japanese
• 空車タクシーの乗客獲得形態選択モデルの構築
  藤田大輔; 吉井稔雄; 北村隆一
  土木学会年次学術講演会講演概要集(CD-ROM), 60th, Disk 2, ROMBUNNO.4-347, 20 Aug. 2005
  Japanese
• 交差点条件と地域差を考慮した信号交差点における停止判断挙動分析
  橋本幸雄; 吉井稔雄; 北村隆一
  土木学会年次学術講演会講演概要集(CD-ROM), 60th, Disk 2, ROMBUNNO.4-316, 20 Aug. 2005
  Japanese
• プローブデータを取り巻く動向と課題
  原田昇; 吉井稔雄; 牧村和彦; 岸知二; 和田光示; 堀口良太; 羽藤英二
  土木計画学研究・講演集(CD-ROM), 31, (SS10), Jun. 2005
  Japanese
• 地域差を考慮した信号切り替わり時における停止判断挙動分析
  片岡源宗; 橋本幸雄; 熊谷靖彦; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 31, (228), Jun. 2005
  Japanese
• プローブデータを用いた空車タクシー挙動分析
  吉井稔雄; 藤田大輔; 北村隆一
  土木計画学研究・講演集(CD-ROM), 31, (200), Jun. 2005
  Japanese
• 空車タクシーの乗客獲得形態の実態把握
  藤田大輔; 吉井稔雄; 北村隆一
  土木学会関西支部年次学術講演会講演概要集(CD-ROM), 2005, IV-63, 29 May 2005
  Japanese
• 交通条件を考慮した信号交差点における停止判断挙動分析
  橋本幸雄; 片岡源宗; 吉井稔雄; 北村隆一
  土木学会関西支部年次学術講演会講演概要集(CD-ROM), 2005, IV-49, 29 May 2005
  Japanese
• MATHEMATICAL ANALYSIS OF EQUILIBRIUM IN DEPARTURE TIME CHOICE PROBLEMS
  IRYO Takamasa; YOSHII Toshio; ASAKURA Yasuo
  Doboku Gakkai Ronbunshu, 779, 105, 118, Japan Society of Civil Engineers, 20 Jan. 2005
  Japanese, This paper shows three theoretical characteristics of the departure time choice problems. Several theoretical studies related to departure time choice problems on the congested road networks have been done and some of them have shown the solution of equilibrium problems under some conditions of travelers' cost functions. This study shows a solution of the equilibrium without the conditions of cost functions, shows the general relationship between user-equilibrium state and system-optimized state, and derives the condition for the existence of the equilibrium.
• An accident analysis of signal intersection focused on the approaching vehicles at the time when yellow starts
  YOSHII Toshio; YAMAOKA Nobutada; KITAMURA Ryuichi
  INFRASTRUCTURE PLANNING REVIEW, 22, 22, 877, 883, Japan Society of Civil Engineers, 2005
  Japanese, This study tries to investigate the relationship between the timing of vehicles approaching to the signal intersection and the potential of the occurrence of accidents. The drivers' decision whether they will stop or go at the signal intersection when yellow starts is analyzed first, and it is confirmed that their decision is affected by the configuration of the signal intersection. Next, using the observation results, ‘Dangerous Zone’ is proposed to be defined on the space-velocity plane at the time when yellow starts. Then, it is shown that proposed ‘Dangerous Zone’ is more relevant to the occurrence of accidents than ‘Dilemma Zone and Option Zone’ which is proposed in the past.
• A Study on Bottleneck Capacity on Divided Two-lane Expressways
  YOSHIKAWA Ryoichi; NAGAHAMA Kazumi; XING Jian; YOSHII Toshio; KITAMURA Ryuichi
  INFRASTRUCTURE PLANNING REVIEW, 22, 22, 839, 845, Japan Society of Civil Engineers, 2005
  Japanese, The paper deals with the bottleneck phenomenon and capacity analysis of the divided two-lane expressways in Japan, which has not been studied so far, although those of the multi-lane expresswayshave been done sufficiently. It is found from the observed data that (1) the bottleneck phenomenon of capacity reduction from the maximum flow rate just before congestion to that discharged from the congestion queue behind bottleneck occurs on the divided two-lane expressways as similar to that of multi-lane expressways;(2) the capacity reduction for the divided two-lane expressways is largerthan that for the multiple-lane expressways;(3) the bottleneck capacity of the divided two-lane expressways is less than the average capacity per lane of the multi-lane expressways. In additions, (4) the relationship between bottleneck capacity and highway geometric characteristics is studied. Finally it suggests a mechanism of improvement of bottleneck capacity by adding an auxiliary lane upstream of the bottleneck for the divided two-lane expressways.
• Development and Evaluation of a Multi-Modal Information Provision System for Promoting the Demand of Public Transport
  YOSHII Toshio; IKEDA Naotaka; KITAMURA Ryuichi
  INFRASTRUCTURE PLANNING REVIEW, 22, 22, 575, 582, Japan Society of Civil Engineers, 2005
  Japanese, This study develops an Internet-based multi-modal information system which provides information on both auto and public transit trips.Trip information such as travel time and cost is displayed on the same screen forauto and public transit trips.Using the developed system, the effect of information on modal shift is analyzed through an experiment in which the subjects are asked to access the information homepage.For a subgroup of the subjects, public transit fare is set free for one week, and possible changes in their perceptions of public transit are examined.Results indicate that private auto users tend to change their perceptions of and attitudes toward public transit after accessing information on it.Yet, it is difficult to make private auto users shift to public transit even if public transit fare is set free for a short period.
• 交通シミュレーション 交通シミュレーション普及に関する促進活動と課題の整理 (自主研究活動報告)
  森津 秀夫; 桑原 雅夫; 吉井 稔雄
  交通工学, 40, 0, 巻末17, 20, 交通工学研究会, 2005
  Japanese
• 交差点追突事故を削減するための車両感応式信号制御方式の構築
  吉井 稔雄
  交通安全対策振興助成研究報告書(一般研究), 20, 15, 19, 佐川交通社会財団, 2005
  Japanese
• 阪神高速13号東大阪線における料金割引実証実験における通勤トリップの経路変更・利用時刻変更行動の分析 (特集 道路の多様な料金施策)
  大藤 武彦; 吉田 聰; 吉井 稔雄
  交通工学, 40, 6, 42, 51, 交通工学研究会, 2005
  Japanese
• Capacity Analysis of Mixed Traffic Flow with Motorcycles
  YOSHII Toshio; SHIOMI Yasuhiro; KITAMURA Ryuichi
  IATSS review, 29, 3, 178, 187, 国際交通安全学会, 31 Dec. 2004
  Japanese
• Development of a signal control system using movable monitoring tools
  Toshio Yoshii; Hiroaki Nishiuchi; Motomune Kataoka
  Proceedings of the International Conference on Applications of Advanced Technologies in Transportation Engineering, 383, 388, 01 Dec. 2004
  English, Scientific journal
• 交通流シミュレータDEBNetSを利用したOD推定アルゴリズムの開発と検証
  村上丈; 菊池輝; 加藤義昭; 菅原尚洋; 小川祐亮; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 30, II(21), Nov. 2004
  Japanese
• 希望利用時刻を考慮した渋滞緩和政策の評価
  古川兼嗣; 井料隆雅; 吉井稔雄; 朝倉康夫
  土木計画学研究・講演集(CD-ROM), 30, II(82), Nov. 2004
  Japanese
• 公共交通利用促進を目的としたマルチモーダル情報提供システムの構築
  池田直隆; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 30, IV(103), Nov. 2004
  Japanese
• 暫定2車線区間のボトルネック上流の付加車線設置による渋滞軽減効果の検討
  吉川良一; 長浜和実; 寒河江克彦; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 30, XI(303), Nov. 2004
  Japanese
• 交通流シミュレータDEBNetSを利用した大規模イベント時の迂回交通の再現
  加藤義昭; 菅原尚洋; 小川祐亮; 村上丈; 菊池輝; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 30, II(22), Nov. 2004
  Japanese
• 新しく提案する目印標識の判読性把握実験
  川口宗良; 吉井稔雄; 松平健; 根岸弘幸
  交通工学研究発表会論文報告集, 24, 181, 184, 交通工学研究会, Oct. 2004
  Japanese
• 右折車による後続直進車のブロッキング現象を考慮した右折容量推計方法の構築
  片岡源宗; 吉井稔雄
  土木計画学研究・論文集, 21, 4, 997, 1003, 30 Sep. 2004
  Japanese
• オートバイを含む交通流を対象とした信号交差点容量推計方法の構築
  塩見康博; 吉井稔雄; 北村一
  土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 2, 4, 369, 01 Sep. 2004
  Japanese
• プローブデータを用いた市街地エリアにおけるタクシー挙動の把握
  中村俊之; 吉井稔雄; 北村一
  土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 2, 4, 394, 01 Sep. 2004
  Japanese
• 路上工事の交通マネジメント 簡易車両感知器とプローブカーを用いた信号制御システム~システムの構築と道路工事実施時の片側交互通行区間への適用~
  西内裕晶; 吉井稔雄
  交通工学, 39, 4, 46, 53, Jul. 2004
  Japanese
• オートバイを含む交通流に対する最適な交差点運用法
  塩見康博; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 29, VII(56), Jun. 2004
  Japanese
• プローブデータを用いた時間的・空間的に異なるタクシー挙動の把握
  吉井稔雄; 中村俊之; 北村隆一
  土木計画学研究・講演集(CD-ROM), 29, V(113), Jun. 2004
  Japanese
• 信号交差点への車両接近タイミングと追突事故との関係分析
  山岡伸匡; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 29, X(50), Jun. 2004
  Japanese
• Study of new signs at intersections for vehicle navigation system.
  松平健; 吉井稔雄; 根岸弘幸; 川口宗良; 大口敬
  ケータイ・カーナビの利用性と人間工学 平成16年, 61, 66, 2004
  Japanese
• Construction of an Estimation Method of the Capacity of each Approach at Signalized Intersections which Deals with the Effect of the Right-Turn Traffic
  KATAOKA Motomune; YOSHII Toshio
  INFRASTRUCTURE PLANNING REVIEW, 21, 21, 997, 1003, Japan Society of Civil Engineers, 2004
  The right-turn traffics, which are forced to keep staying at an intersection due to the opposing traffic, usually obstruct the following vehicles' way if there is not enough width on the road. This research focuses on such a phenomenon called ‘the blocking phenomenon’, and construct new capacity estimation methods for several types of signal intersections. The capacities are estimated using the signal control parameter, the right-turn traffic ratio and the saturation degree of the opposing traffic, etc.
  In this paper, after estimation methods for three-leg intersection are constructed, the fitness of each method is checked using actual observation data.
• Equivalence between minimization of total schedule cost and equilibrium in departure time choice problems
  IRYO Takamasa; YOSHII Toshio; ASAKURA Yasuo
  INFRASTRUCTURE PLANNING REVIEW, 21, 21, 823, 828, Japan Society of Civil Engineers, 2004
  Japanese, This study shows that the total schedule cost is minimized in the equilibrium condition of a departure time choice problem with schedule constraint on travelers' arrival time.“Demand spreading policy” is well known as the method of congestion al leviation by spreading traveler's demand over time. But, travelers' desired arrival times at destinations are not considered expli citly and it has not been revealed yet whether the policy is socially suitable or not. This study makes an analysis of a depart ure time choice problem and solves the theorern, “The minimized total schedule cost can be obtained in the equilibrium”.
• 簡易車両感知器とプローブカーを用いた信号制御システム--システムの構築と道路工事実施時の片側交互通行区間への適用 (特集 路上工事の交通マネジメント)
  西内 裕晶; 吉井 稔雄
  交通工学, 39, 4, 46, 53, 交通工学研究会, 2004
  Japanese
• 気軽に使える便利な道具に--交通シミュレーション (特集 交通流シミュレーションの適用と課題)
  吉井 稔雄
  交通工学, 39, 2, 3, 7, 交通工学研究会, 2004
  Japanese
• 出発時刻選択問題における総スケジュールコスト最小化と均衡状態との等価性
  井料隆雅; 吉井稔雄; 朝倉康夫
  土木計画学研究・講演集(CD-ROM), 28, I(51), Nov. 2003
  Japanese
• 孤立信号交差点における遅れ時間最小化とCO₂排出量最小化制御の相違
  西内裕晶; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 28, VII(187), Nov. 2003
  Japanese
• 交差点迂回交通調査に基づくプローブデータの有用性の検討
  北村清州; 山本俊行; 吉井稔雄; 森川高行
  交通工学研究発表会論文報告集, 23, 153, 156, 交通工学研究会, Oct. 2003
  Japanese
• ドライビングシミュレータ実験による目印標識の違いによって異なる車両運転挙動の比較分析
  川口宗良; 吉井稔雄; 大口敬; 松平健
  交通工学研究発表会論文報告集, 23, 105, 108, 交通工学研究会, Oct. 2003
  Japanese
• 実用化に向けた片側交互通行区間における信号運用システムの構築
  西内裕晶; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 2, IV-283, 01 Sep. 2003
  Japanese
• 効率的な地域ITS推進のための方法論の提案
  岡村健志; 吉井稔雄; 轟朝幸; 吉村浩司; 熊谷靖彦
  土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 2, IV-194, 01 Sep. 2003
  Japanese
• 対向アプローチの交通状態に依存した右折実行可能性調査
  片岡源宗; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 2, IV-203, 01 Sep. 2003
  Japanese
• プローブカーデータによる細街路通過交通の分析
  北村清州; 山本俊行; 吉井稔雄; 森川高行
  土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 2, IV-215, 01 Sep. 2003
  Japanese
• 新しく提案する交差点目印標識設置効果を把握するためのドライビングシミュレータを用いた室内実験
  川口宗良; 吉井稔雄; 大口敬; 松平健; 濁沢雅
  土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 2, IV-204, 01 Sep. 2003
  Japanese
• 「交通シミュレーション再現性検証用データセットの構築」への討議・回答
  関根 憲一; 花房 比佐友; 吉井 稔雄; 堀口 良太; 赤羽 弘和; 片倉 正彦; 桑原 雅夫; 尾崎 晴男; 大口 敬; 西川 功
  土木学会論文集 = Proceedings of JSCE, 737, 247, 250, 土木学会, 20 Jul. 2003
  Japanese
• 右折車による後続直進車のブロック現象を考慮した交差点容量推計方法の構築
  片岡源宗; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 27, X(181), Jun. 2003
  Japanese
• 交通シミュレーションに用いる車両移動モデルの構築に向けた細街路エリア内の車両挙動観測調査
  北村清州; 吉井稔雄; 山本俊行; 森川高行
  土木計画学研究・講演集(CD-ROM), 27, XI(184), Jun. 2003
  Japanese
• 効率的な地域ITS推進のための方法論の提案と検証
  岡村健志; 吉井稔雄; 轟朝幸; 吉村浩司; 熊谷靖彦
  土木計画学研究・講演集(CD-ROM), 27, VI(111), Jun. 2003
  Japanese
• 自動車通過交通が歩行者・自転車交通に及ぼす影響と自動車通過交通の観測法に関する分析
  山本俊行; 北村清州; 吉井稔雄; 北村隆一
  土木計画学研究・講演集(CD-ROM), 27, VII(80), Jun. 2003
  Japanese
• 地方中核都市圏街路網への動的配分シミュレーションモデルの適用-ピーク時交通量削減による渋滞緩和効果の把握-
  遠藤玲; 古川誠; 吉井稔雄
  土木計画学研究・講演集(CD-ROM), 27, XIII(191), Jun. 2003
  Japanese
• 都市内高速道路シミュレーションモデルの適用について
  中村毅一郎; 森田ひろ之; 吉井稔雄; 小根山裕之; 島崎雅博
  土木計画学研究・講演集(CD-ROM), 27, XIII(190), Jun. 2003
  Japanese
• 都市高速道路における交通流シミュレーションモデルの適用
  鈴木裕介; 原隆広; 桑原雅夫; 森田ひろ之; 吉井稔雄
  交通工学, 38, 1, 56, 65, 交通工学研究会, Jan. 2003
  Japanese
• Construction of a Data Set for Validation of Traffic Simulations
  SEKINE Kenichi; NISHIKAWA Isao; HANABUSA Hisatomo; YOSHII Toshio; HORIGUCHI Ryota; AKAHANE Hirokazu; KATAKURA Masahiko; KUWAHARA Masao; OZAKI Haruo; OGUCHI Takashi
  Doboku Gakkai Ronbunshu, 2003, 737, 247, 250, Japan Society of Civil Engineers, 2003
• 簡易感知器とプローブカーデータを用いた片側交互通行信号制御システムの構築
  片岡源宗; 吉井稔雄; 西内裕晶
  土木計画学研究・講演集, 26(CD-ROM), Pt.2, KOEMBANGO259, Nov. 2002
  Japanese
• 新しく提案する交差点名称補助標識の視認性比較実験
  川口宗良; 吉井稔雄; 松平健
  土木計画学研究・講演集, 26(CD-ROM), Pt.1, KOEMBANGO159, Nov. 2002
  Japanese, Scientific journal
• CO₂排出量を考慮した片側交互通行区間における車両誘導方法決定システム
  吉井稔雄; 西内裕晶; 片岡源宗
  交通工学研究発表会論文報告集, 22nd, 125, 128, Oct. 2002
  Japanese
• CO2排出量を考慮した片側交互通行区間における車両誘導方法決定システム
  吉井 稔雄; 西内 裕晶; 片岡 源宗
  交通工学研究発表会論文報告集, 22, 125, 128, 交通工学研究会, Oct. 2002
  Japanese
• 道案内を目的とした交差点名称補助標識の視認性比較実験
  川口宗良; 吉井稔雄
  交通工学研究発表会論文報告集, 22, 17, 20, 交通工学研究会, Oct. 2002
  Japanese
• 右折車による直進車ブロック現象を考慮した交差点容量推計式
  片岡源宗; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 57th, IV-208, 01 Sep. 2002
  Japanese
• CO₂排出量を考慮した片側交互通行区間での車両誘導方法決定システム
  西内裕晶; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 57th, IV-266, 01 Sep. 2002
  Japanese
• 道案内を目的とした交差点視認性比較
  川口宗良; 吉井稔雄
  土木学会年次学術講演会講演概要集(CD-ROM), 57th, IV-337, 01 Sep. 2002
  Japanese
• 都市内高速道路シミュレーションモデルにおけるパラメータの設定について
  島崎雅博; 森内正寿; 吉井稔雄; 小根山裕之; 森田ひろ之
  土木計画学研究・講演集, 25(CD-ROM), Pt.2, KOEMBANGO135, Jun. 2002
  Japanese
• ITSセンシング技術を活用した交通信号制御アルゴリズム
  赤羽弘和; 桑原雅夫; 越正毅; 尾崎晴男; 安井一彦; 中村英樹; 大口敬; 吉井稔雄; 小根山裕之
  土木計画学研究・講演集, 25(CD-ROM), Pt.2, KOEMBANGO128, Jun. 2002
  Japanese
• 右折率を考慮した交差点容量の推計
  吉井稔雄; 片岡源宗
  土木計画学研究・講演集, 25(CD-ROM), Pt.1, KOEMBANGO19, Jun. 2002
  Japanese
• 大規模ネットワークへの適用時に高い再現性を確保する動的ネットワークシミュレーションモデルの提案
  吉井稔雄
  土木計画学研究・講演集, 25(CD-ROM), Pt.2, KOEMBANGO142, Jun. 2002
  Japanese
• 紹介 第24回土木計画学研究発表会
  吉井 稔雄
  高速道路と自動車, 45, 4, 65, 67, 高速道路調査会, Apr. 2002
  Japanese
• 信号現示切り替え時における車両加減速挙動の分析
  宮田健治; 吉井稔雄
  土木計画学研究・講演集, 24,Pt.1, 329, 330, 20 Nov. 2001
  Japanese
• ランプメータリングによる渋滞軽減効果の定量的評価
  佐藤博信; 吉井稔雄
  土木計画学研究・講演集, 24,Pt.2, 677, 680, 20 Nov. 2001
  Japanese
• ITS行動モデルシミュレーション
  羽藤英二; 吉井稔雄; 藤井聡; 大口敬; 内田敬; 室町泰徳; 加藤博和; 坂本邦宏; 井料隆雅
  土木計画学研究・講演集, 24,Pt.1, 725, 731, 20 Nov. 2001
  Japanese
• CONSTRUCTION OF A DATA SET FOR VALIDATION OF TRAFFIC SIMULATIONS
  HANABUSA Hisatomo; YOSHII Toshio; HORIGUCHI Ryota; AKAHANE Hirokazu; KATAKURA Masahiko; KUWAHARA Masao; OZAKI Haruo; OGUCHI Takashi; NISHIKAWA Isao
  土木学会論文集 = Proceedings of JSCE, 688, 115, 123, 土木学会, 20 Oct. 2001
  Japanese
• ランプメータリングによる渋滞軽減の可能性について
  吉井稔雄; 佐藤博信
  交通工学研究発表会論文報告集, 21, 337, 340, 交通工学研究会, Oct. 2001
  Japanese
• 視認性向上を目的とした新しい交差点名称標識の提案
  松平健; 吉井稔雄; 川口宗良
  交通工学研究発表会論文報告集, 21, 269, 272, 交通工学研究会, Oct. 2001
  Japanese
• ランプメータリングによる渋滞軽減効果に関する定量的評価
  佐藤博信; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 56th, 784, 785, 01 Sep. 2001
  Japanese
• 色情報を持ち合わせた交差点目印標識と既存標識との視認性比較
  川口宗良; 吉井稔雄; 松平健
  土木学会年次学術講演会講演概要集 第4部, 56th, 56, 57, 01 Sep. 2001
  Japanese
• AN ANALYSIS ON DYNAMIC SYSTEM OPTIMAL ASSIGNMENT AND RAMP CONTROL ON A SIMPLE NETWORK
  KUWAHARA Masao; YOSHII Toshio; KUMAGAI Kotaro
  Doboku Gakkai Ronbunshu, 667, 667, 59, 71, Japan Society of Civil Engineers, 20 Jan. 2001
  Japanese, This research analyses theoretical aspects on DSO (the Dynamic System Optimal assignment) and the ramp control using a simple network with parallel freeway and arterial. First, the dynamic marginal cost, which plays an important role in the dynamic analysis, is defined and several queuing patterns in DSO are described. Second, based on the DSO discussion, the ramp control strategy is analyzed. It has not been known whether the ramp control can indeed reduce the total travel time not only on the freeway but on the arterial, since the control basically decreases capacity of a link on a network. However, the analysis reveals required conditions and the optimal strategy so that the ramp control can effectively reduce the total travel cost.
• Construction of a Data Set for Validation of Traffic Simulations.
  HANABUSA Hisatomo; YOSHII Toshio; HORIGUCHI Ryota; AKAHANE Hirokazu; KATAKURA Masahiko; KUWAHARA Masao; OZAKI Haruo; OGUCHI Takashi; NISHIKAWA Isao
  Doboku Gakkai Ronbunshu, 2001, 688, 115, 123, Japan Society of Civil Engineers, 2001
  Japanese, In this study, a data set for validating traffic simulation models was constructed. A plate-number-matching survey was conducted in an area between Kichijoji- and Mitaka-Station that were located in the west part of Tokyo. Observation errors in the survey data were corrected in order to estimate trajectories of vehicles. Hourly origin-destination tables were estimated by enlarging the aggregated trajectories. The date set that is applicable to most traffic simulation models in terms of data format is available on the Internet by the name of Kichijoji Benchmark Data Set.
• DEVELOPMENT OF OPTIMUM RAMP METERING SYSTEM
  Toshio Yoshii
  TRANSPORTATION PLANNING AND MANAGEMENT IN THE 21ST CENTURY, 193, 198, 2001, [Peer-reviewed]
  English, International conference proceedings
• 次世代高度信号パラメータ決定システムの検証用データの獲得
  吉井稔雄; 山口宗希; 重岡誠一朗
  土木計画学研究・講演集, 23,Pt.2, 719, 722, 20 Nov. 2000
  Japanese
• 右左折率により変化する飽和交通流率の観測
  文野雅也; 山田俊和; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 55th, 38, 39, 31 Aug. 2000
  Japanese
• 方向別交通量を用いた信号制御最適化ツールの検証用データ
  塩見礼佳; 坂元陽祐; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 55th, 56, 57, 31 Aug. 2000
  Japanese
• Travel Behavior Model and Dynamic Traffic Simulation toward ITS Society. An Evaluation Method on Effects of Dynamic Traffic Information Provision.
  吉井稔雄; 桑原雅夫
  土木学会論文集, 653, 39, 48, 20 Jul. 2000
  Japanese
• AN EVALUATION METHOD ON EFFECTS OF DYNAMIC TRAFFIC INFORMATION PROVISION
  YOSHII Toshio; KUWAHARA Masao
  Doboku Gakkai Ronbunshu, 653, 39, 48, Japan Society of Civil Engineers, 20 Jul. 2000
  Japanese, This study proposes a realistic method to evaluate impacts of dynamic traffic information provision, and the method is applied to a real urban expressway network using observed OD volumes. Although traffic information has been dynamically provided through VMS, on-board equipment, highway radio etc., the impacts on traffic have not been well evaluated by taking the daily OD demand fluctuation. We therefore propose a new evaluation method considering the OD demand variation and show a possibility that the information provision may lead to total travel time increase. To examine this possibility, the method is then applied to the Tokyo Metropolitan Expressway network for one month. As a result, it is confirmed that dynamic traffic information provision would not be effective under regular traffic conditions except at the beginning of a peak. However, the benefit arises in unusual traffic conditions caused by incidents.
• Travel Behavior Model and Dynamic Traffic Simulation toward ITS Society
  HATO Eiji; YOSHII Toshio
  土木学会論文集 = Proceedings of JSCE, 653, 2, 2, 土木学会, 20 Jul. 2000
  Japanese
• Travel Behavior Model and Dynamic Traffic Simulation toward ITS Society
  HATO Eiji; YOSHII Toshio
  Doboku Gakkai Ronbunshu, 2000, 653, 2, 2, Japan Society of Civil Engineers, 2000
• Automation of parameter tuning of traffic flow simulator.
  古川誠; 桑原雅夫; 赤羽弘和; 吉井稔雄
  交通工学研究発表会論文報告集, 19th, 57, 60, 交通工学研究会, Dec. 1999
  Japanese
• A Study on Dynamic System Optimum Assignment and Ramp Flow Control Employing a Simple Network.
  熊谷香太郎; 桑原雅夫; 吉井稔雄
  土木計画学研究・講演集, 22,Pt.1, 595, 598, 20 Oct. 1999
  Japanese
• Problems to standardization of traffic simulation model. Support to model verification with information interchange in Clearing house. Activities on model standardization through Verification and Validation.
  吉井稔雄; 堀口良太; 大口敬
  土木計画学研究・講演集, 22,Pt.1, 698, 20 Oct. 1999
  Japanese
• A study on variation of OD volumes of urban expressway.
  村上康紀; 吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 22,Pt.2, 251, 254, 20 Oct. 1999
  Japanese
• A Method of Auto-Tuning of Parameters for Traffic Simulation.
  古川誠; 山崎徹; 吉井稔雄; 赤羽弘和; 桑原雅夫
  土木計画学研究・講演集, 22,Pt.2, 841, 844, 20 Oct. 1999
  Japanese
• Estimation of Traffic Improvement by Providing Dynamic Traffic Information.
  吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 22,Pt.2, 215, 218, 20 Oct. 1999
  Japanese
• Estimation of Travel Demand and Evaluation of Traffic Management Schemes using Network Simulators in Disaster.
  田中伸治; 桑原雅夫; 赤羽弘和; 吉井稔雄
  土木計画学研究・講演集, 22,Pt.2, 499, 502, 20 Oct. 1999
  Japanese
• Estimating Traffic data using UPLINK information from Infrared Beacons.
  増山義人; 吉井稔雄; 赤羽弘和; 桑原雅夫
  土木計画学研究・講演集, 22,Pt.2, 255, 258, 20 Oct. 1999
  Japanese
• A Study on Efficiency within a Parking Area.
  佐藤賢; 吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 22,Pt.2, 829, 832, 20 Oct. 1999
  Japanese
• An analysis on variation of OD volumes using traffic detector data
  Murakami Yasunori; Yoshii Toshio; Kuwahara Masao
  Monthly journal of the Institute of Industrial Science, University of Tokyo, 51, 4, 145, 148, 東京大学, Apr. 1999
  Japanese
• Development of an Evaluation System for Route Guide Signs.
  高松誠治; 桑原雅夫; 赤羽弘和; 吉井稔雄; 飯島護久; 石渡章浩
  交通工学, 34, 1, 25, 35, 交通工学研究会, Jan. 1999
  Japanese
• 大規模ネットワークに適用可能な動的配分シミュレーションモデルの開発と適用
  吉井稔雄
  大規模ネットワークに適用可能な動的配分シミュレーションモデルの開発と適用, 176, 1999
• An analysis on variation of OD volumes using traffic detector data
  MURAKAMI Yasunori; YOSII Toshio; KUWAHARA Masao
  SEISAN KENKYU, 51, 6, 584_2, 584_2, Institute of Industrial Science The University of Tokyo, 1999
  Japanese, p.145本文中に誤りがあったため、訂正しました。
• アップリンク情報処理とOD推定
  増山義人; 織田利彦; 桑原雅夫; 吉井稔雄; 新倉聡
  電気学会研究会資料 道路交通研究会, RTA-98-23～29, 7, 12, Dec. 1998
  Japanese, Scientific journal
• Construction of a Benchmark Data Set for Traffic Simulation Systems.
  花房比佐友; 吉井稔雄; 堀口良太; 赤羽弘和
  土木計画学研究・講演集, 21, Pt.1, 583, 586, Nov. 1998
  Japanese
• A Study on Traffic Controls for achievement of Dynamic System Optimal Status.
  熊谷香太郎; 桑原雅夫; 吉井稔雄
  土木計画学研究・講演集, 21, Pt.1, 427, 430, Nov. 1998
  Japanese
• OD Demand Estimation from Beacon Information.
  中村良太; 増山義人; 桑原雅夫; 吉井稔雄; 赤羽弘和
  土木計画学研究・講演集, 21, Pt.2, 317, 320, Nov. 1998
  Japanese
• Automated Method of Parameter Tuning which is Included in Traffic Simulation.
  吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 21, Pt.2, 313, 316, Nov. 1998
  Japanese
• Study on traffic congestion reduction by spatial and temporal dispersion of road transportation demand.
  味沢慎吾; 吉井稔雄; 桑原雅夫
  交通工学研究発表会論文報告集, 18th, 18, 13, 16, 交通工学研究会, Nov. 1998
  Japanese
• Simulation for Traffic Engineering. 9. An Evaluation of Effects of Predicted Traffic Information.
  吉井稔雄
  交通工学, 33, 6, 65, 69, 交通工学研究会, Nov. 1998
  Japanese
• A Study on Accuracy of Origin-Destination Volumes Estimated from The OD Survey on the Metropolitan Expressway.
  酒井浩一; 田中伸治; 吉井稔雄; 桑原雅夫
  交通工学, 33, 6, 17, 27, 交通工学研究会, Nov. 1998
  Japanese
• A Benchmark data set for validity evaluation of road network simulation models
  R. Horiguchi; T. Yoshii; H. Akahane; M. Kuwahara; M. Katakura; H. Ozaki; T. Oguchi
  5th World Congress on ITS, Oct. 1998, [Peer-reviewed]
  English, International conference proceedings
• Development of optical vehicle detector uplink information processing algorithm for OD estimation.
  増山義人; 桑原雅夫; 吉井稔雄; 中村良太
  土木学会年次学術講演会講演概要集 第4部, 53rd, 682, 683, Oct. 1998
  Japanese
• Consideration on fundamental property of optimum allocation of dynamic system.
  熊谷香太郎; 桑原雅夫; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 53rd, 590, 591, Oct. 1998
  Japanese
• Research on delay reduction effect by spatial/temporal dispersion of road traffic demand.
  味沢慎吾; 吉井稔雄; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 53rd, 600, 601, Oct. 1998
  Japanese
• Construction of data set for reproducibility verification of traffic simulation system.
  花房比佐友; 吉井稔雄; 堀口良太; 赤羽弘和
  土木学会年次学術講演会講演概要集 第4部, 53rd, 534, 535, Oct. 1998
  Japanese
• Examination on OD estimation method based on Metropolitan Expressway OD survey.
  田中伸治; 酒井浩一; 吉井稔雄; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 53rd, 564, 565, Oct. 1998
  Japanese
• Consideration on reproducibility of dynamic traffic simulation model.
  吉井稔雄; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 53rd, 602, 603, Oct. 1998
  Japanese
• Uplink Information andOD Estimating
  Mashiyama Yoshito; Kuwahara Masao; Yoshii Toshio
  Monthly journal of the Institute of Industrial Science, University of Tokyo, 50, 10, 43, 46, 東京大学, Oct. 1998
  Japanese
• Comparative study of freeway incident detection algorithms using real-life incident data
  Chung Edward; Kuwahara Masao; Yoshii Toshio
  Monthly journal of the Institute of Industrial Science, University of Tokyo, 50, 9, 329, 332, 東京大学, Sep. 1998
  English
• Simulation for Traffic Engineering. 7. An Outline of Simulation Technology.
  吉井稔雄
  交通工学, 33, 4, 75, 87, 交通工学研究会, Jul. 1998
  Japanese
• SURVEY ON THE ACTUAL PHENOMENON ABOUT ROUTE CHOICE IN TOKYO METROPOLITAN EXPRESSWAY
  OGUCHI Takashi; HATO Eiji; TANIGUCHI Masaaki; YOSHII Toshio; KUWAHARA Masao; MORITA Hirohisa
  Doboku Gakkai Ronbunshu, 590, 590, 87, 95, Japan Society of Civil Engineers, 20 Apr. 1998
  Japanese, The method with which amore reliable RP data set could be derived is proposed. It is the composition of the data collected with questionair to the drivers who actually using Tokyo Metropolitan Expressway and AVI data and vehicle detector data collected by Traffic Control Center system of the Expressway. The purpose of the study, using these data, is to develop a better route choice model and to validate it with the actual data. This report deals with the outline of the method of data collection and data treatment, and with the basic analysis such as data reliability or error rate of answers.
• Estimation of a Time Dependent OD Matrix from Traffic Counts Using Dynamic Traffic Simulation
  YOSHII Toshio; KUWAHARA Masao; AKAHANE Hirokazu; HORIGUCHI Ryota
  INFRASTRUCTURE PLANNING REVIEW, 15, 15, 461, 468, Japan Society of Civil Engineers, 1998
  Japanese, This study proposes and develops an OD (Origin-Destination) estimating method from traffic counts using dynamic traffic simulation. The proposed method intends to get an OD matrix which is required by dynamic traffic simulation so as to reproduce observed counts. After development, we evaluate how accurately it can estimatean OD matrixusing actual road network. In result, we confirm that the method cannot estimate exact OD matrix because it intends to get an OD matrix by which simulation can reproduce observed counts. However, we understand what a extent (a) accuracy of simulation performance, (b) number of observed counts and (c) other information effect the accuracy of estimated OD.
• Possibilities of Traffic Improvement by Dispersion of Vehicles' Trips(共著)
  Proceedingsof The 5th Annual World Congress on Intelligent Transport Systems '98 Seoul, CD-ROM, 1998
  English, Scientific journal
• Estimation of a Time Dependent OD Matrix from Traffic Counts Using Dynamic Traffic Simulation(共著)
  Proceedingsof 8th WCTR, 1998
  English, International conference proceedings
• Construction of a bench mark data set for traffic simulation systems.
  花房比佐友; 白石智良; 赤羽弘和; 吉井稔雄; 堀口良太
  土木計画学研究・講演集, 20 Pt 1, 497, 499, Nov. 1997
  Japanese
• Estimation of a Time Dependent OD Matrix from Traffic Counts Using Dynamic Traffic Simulation.
  吉井稔雄; 桑原雅夫; 赤羽弘和; 堀口良太
  土木計画学研究・講演集, 20 Pt 1, 501, 504, Nov. 1997
  Japanese
• Development of an Evaluation System for Route Guide Signs.
  高松誠治; 桑原雅夫; 赤羽弘和; 吉井稔雄
  土木計画学研究・講演集, 20 Pt 2, 871, 874, Nov. 1997
  Japanese
• Construction of benchmark data sets for network simulation. Extraction of a car route.
  堀口良太; 赤羽弘和; 吉井稔雄; 花房比佐友; 山口智浩
  土木学会年次学術講演会講演概要集 第4部, 52nd, 154, 155, Sep. 1997
  Japanese
• Dynamic OD estimation method using roadside observation traffic volume. Estimation using a simulation.
  吉井稔雄; 桑原雅夫; 赤羽弘和; 堀口良太
  土木学会年次学術講演会講演概要集 第4部, 52nd, 158, 159, Sep. 1997
  Japanese
• Construction of data set for reproducibility verification of traffic simulation system.
  花房比佐友; 山口智浩; 赤羽弘和; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 52nd, 150, 151, Sep. 1997
  Japanese
• Reproduction of Traffic Flow with Block Density Method.
  桑原雅夫; 吉井稔雄; 堀口良太
  交通工学, 32, 4, 39, 44, 交通工学研究会, Jul. 1997
  Japanese
• A Study on Optimal Signal Parameters for the Responsive Control at an Isolated Intersection.
  麦倉武志; 吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 19 Pt 2, 237, 240, Nov. 1996
  Japanese
• Influence of Prediction Errors in Traffic Conditions on Dynamic Route Guidance.
  吉井稔雄; 赤羽弘和; 桑原雅夫
  土木計画学研究・講演集, 19 Pt 2, 745, 748, Nov. 1996
  Japanese
• Development and verification of general street network simulation models.
  岡村寛明; 桑原雅夫; 吉井稔雄; 西川功
  交通工学研究発表会論文報告集, 16th, 16, 93, 96, 交通工学研究会, Nov. 1996
  Japanese
• A Development of a Dynamic Traffic Simulation Model for Urban Road Networks : SOUND
  Kuwahara Masao; Yoshii Toshio; Morita Hirohisa; Okamura Hiroaki
  Monthly journal of the Institute of Industrial Science, University of Tokyo, 48, 10, 511, 514, The University of Tokyo, Oct. 1996
  Japanese
• Expansion of a supersaturated network simulation model to a general street and application of it to a real network.
  岡村寛明; 桑原雅夫; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 51st, 450, 451, Sep. 1996
  Japanese
• Basic researches on booking system at expressways.
  清宮正好; 桑原雅夫; 赤羽弘和; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 51st, 392, 393, Sep. 1996
  Japanese
• OD estimation method by traffic volumes observed on roadsides. Simultaneous estimation with parameter of route selection model.
  吉井稔雄; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 51st, 348, 349, Sep. 1996, [Lead author]
  Japanese
• The Report of the 7th World Conference on Transport Research at Sydney and of Traffic Situation in Australia
  Yoshii Toshio
  Monthly journal of the Institute of Industrial Science, University of Tokyo, 48, 1, 5, 6, The University of Tokyo, Jan. 1996
  Japanese
• ＲＰ調査に基づいた動的交通情報提供がドライバーの経路選択行動に与える影響分析
  ジョイ; バタチャリア; 吉井稔雄; 桑原雅夫
  土木計画学研究発表会講演集, 18(2), 497, 500, Dec. 1995
  Japanese, Scientific journal
• 交通情報が経路選択行動に及ぼす影響分析
  麦倉武志; 桑原雅夫; 吉井稔雄; 越正毅
  土木学会年次学術講演会講演概要集 第4部, 50th, 80, 81, Sep. 1995
  Japanese
• 過飽和ネットワークシミュレーションモデルの一般街路への拡張
  岡村寛明; 桑原雅夫; 吉井稔雄
  土木学会年次学術講演会講演概要集 第4部, 50th, 114, 115, Sep. 1995
  Japanese
• 都市高速道路における予測交通情報の提供効果
  吉井稔雄; 赤羽弘和; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 50th, 86, 87, Sep. 1995
  Japanese
• A Network Simulation Model for Oversaturated Flow on Urban Expressways.
  吉井稔雄; 桑原雅夫; 森田さだ之
  交通工学, 30, 1, 33, 41, Jan. 1995
  Japanese
• 都市内高速道路の過飽和ネットワークシミュレーションモデルの開発
  吉井稔雄; 桑原雅夫
  土木学会年次学術講演会講演概要集 第4部, 49th, 746, 747, Sep. 1994
  Japanese
• A Study on the Vehicle Motion Logic of CONTRAM.
  小根山裕之; 桑原雅夫; 吉井稔雄; 岡田知朗
  生産研究, 46, 3, 202, 205, Mar. 1994
  Japanese
• A Traffic Simulation Model for Oversaturated Traffic Flow on Urban Expressway.
  吉井稔雄; 桑原雅夫
  土木計画学研究・講演集, 16 Pt 1-1, 121, 126, Dec. 1993
  Japanese
• 変状の無いパッチのみを学習する識別器による非正常な路面の検出手法
  AIデータサイエンス論文集, 1908
• 運搬排雪・拡幅除雪が冬期の幹線道路における交通流状態に与える影響
  交通工学論文集, 1900
• latoon-based Traffic Flow Model to Estimate Stochastic Traffic Capacity on Freeway Bottlenecks
  吉井 稔雄
  [Peer-reviewed]

• Label correction in estimation method of winter road surface condition by deep learning based on highway data for adapting national roads
  石附将武; 高橋翔; 萩原亨; 吉井稔雄, AI・データサイエンス論文集(Web), 6, 1, 2025
• A Study on the Provision Method of Visibility Information in Winter and Its Effects on Behavioral Intention
  福井千菜美; 丹悠紀; 高橋翔; 吉井稔雄; 萩原亨, AI・データサイエンス論文集(Web), 6, 1, 2025
• A method for predicting road surface condition based on Multi-LSTM using time-spatial data in winter road environment
  本坂健太; 八木雅大; 高橋翔; 吉井稔雄; 萩原亨, AI・データサイエンス論文集(Web), 6, 1, 2025
• AN EXAMINATION OF LABEL CORRECTION FOR WINTER ROAD SURFACE CONDITION ESTIMATION USING DEEP LEARNING
  石附将武; 高橋翔; 萩原亨; 吉井稔雄, 土木計画学研究・講演集(CD-ROM), 70, 2024
• A STUDY ON THE PROVISION METHOD OF VISIBILITY INFORMATION IN WINTER, AND ITS EFFECTS ON BEHAVIORAL INTENTION
  丹悠紀; 福井千菜美; 高橋翔; 吉井稔雄; 萩原亨, 土木計画学研究・講演集(CD-ROM), 70, 2024
• 信号制御パラメータ改良による渋滞対策実施効果
  吉井稔雄; 森倉遼太; 河本一; 坪田隆宏; 高橋翔, 土木計画学研究・講演集(CD-ROM), 70, 2024
• 事故リスク情報を活用した交通安全マネジメント
  勝村涼; 吉井稔雄; 坪田隆宏; 倉内慎也; 折野好倫, 土木計画学研究・講演集(CD-ROM), 67, 2023
• Impact on Low Risk Route Choice Behavior by Using Communication Method about Traffic Accident Risk
  AHN Yoongho; 西内裕晶; 倉内慎也; 吉井稔雄; 佐野可寸志; 大藤武彦, 土木計画学研究・講演集(CD-ROM), 64, 2021
• Congestion measures of intersection by a right turn vehicles
  宗光 太助; 吉井 稔雄; 倉内 慎也; 坪田 隆宏; 前野 慎介, 交通工学研究発表会論文集, 41, 313, 316, 2021
  交通工学研究会, Japanese
• 夜間走行時におけるドライバーの外発性注意の特性分析
  田地竣; 白柳洋俊; 吉井稔雄; 倉内慎也; 坪田隆宏, 交通工学研究発表会論文集, Aug. 2019, [Peer-reviewed]
  Japanese
• Emerging Transport Technologies for Next Generation Mobility: Preface
  Toshio Yoshii; Yasuhiro Shiomi; Takahiro Kusakabe; Kentaro Wada, Transportation Research Procedia, 34, 1, 3, Dec. 2018
  English
• 阪神高速道路における舗装の供用年数を考慮した事故リスク分析
  河野颯舞; 吉井稔雄; 坪田隆宏; 白柳洋俊, 土木学会四国支部第24回技術研究発表会, May 2018
  Summary national conference
• Impact of Long-Continuous Driving Vehicles on Accident Risks
  Takahiro Tsubota; Toshio Yoshii; Koichi Ogura, The 7th International Symposium on Transportation Network Reliability,, Jan. 2018, [Peer-reviewed]
  English, Summary international conference
• 事故の重大性を考慮した都市高速道路における交通事故リスク要因分析
  兵頭知; 轟朝幸; 吉井稔雄, 土木計画学研究・講演集(CD-ROM), 55, ROMBUNNO.19‐04, 29 May 2017
  Japanese
• 長時間連続運転車両が事故発生リスクに与える影響分析
  小倉晃一; 坪田隆宏; 吉井稔雄; 白柳洋俊, 土木計画学研究・講演集(CD-ROM), 55, ROMBUNNO.19‐09, 29 May 2017
  Japanese
• 事故率と重大事故率の知覚に着目した高速道路利用意識の分析
  倉内慎也; 大山貴志; 吉井稔雄; 白柳洋俊, 土木計画学研究・講演集(CD-ROM), 55, ROMBUNNO.19‐05, 29 May 2017
  Japanese
• 道路環境の違いに着目した交通事故発生リスクに関する分析
  兵頭知; 吉井稔雄; 柴崎宏武, 自動車技術会大会学術講演会講演予稿集(CD-ROM), 2017, ROMBUNNO.252, 22 May 2017
  Japanese
• ドライバーの個人差を考慮した連続運転時間と運転挙動の関係分析
  田中優司; 吉井稔雄; 坪田隆宏; 松下聖史, 土木学会四国支部第23回技術研究発表会, May 2017
  Summary national conference
• 交通環境に着目した交通事故発生リスクの地域差に関する考察
  柴崎宏武; 兵頭知; 吉井稔雄, 土木計画学研究・講演集(CD-ROM), 55, ROMBUNNO.19‐16, May 2017
  Japanese
• ETC2.0データを活用した生活道路の交通事故リスク分析
  坪田隆宏; 山本篤志; 吉井稔雄; 倉内慎也, 土木計画学研究・講演集(CD-ROM), 55, ROMBUNNO.19‐20, May 2017
  Japanese
• まちなか回遊時における注意の偏りが主観的時間の歪みに及ぼす影響
  白柳洋俊; 吉井稔雄; 山本祥大, 土木計画学研究・講演集(CD-ROM), 54, ROMBUNNO.17, Nov. 2016
  Japanese
• Bluetooth通信を用いた交通流動データにおけるダブルカウント発生状況の分析
  尾高慎二; 吉井稔雄; 神戸信人, 土木計画学研究・講演集(CD-ROM), 54, ROMBUNNO.P39, Nov. 2016
  Japanese
• Descriptive analysis of detouring traffic through neighborhood streets using probe car data
  Seishu Kitamura; Toshiyuki Yamamoto; Toshio Yoshii; Tomio Miwa, Proceedings of the 10th World Congress on Intelligent Transport Systems, November 16-20, 2003, Madrid, Spain, 2003
  The relationship between the travel speed at the main road and that detouring through neighborhood streets is examined by using the probe car information. The results suggest that the two travel speeds are positively correlated, implying that more drivers detour from the main road to the neighborhood street when the congestion at the former is severer. The results also show that the travel speed through the neighborhood streets has considerable variances regardless of the travel speed at the main road., English, Summary national conference

• The expanding sphere of travel behaviour research : selected papers from the 11th International Conference on Travel Behaviour Research
  International Conference on; Travel Behaviour; 北村 隆一; 吉井 稔雄; 山本 俊行
  Emerald, 2009, 9781848559363, English
• 環境負荷を考慮した信号パラメータ最適化ツールの開発と検証
  吉井 稔雄; 京都大学大学院工学研究科
  [吉井稔雄], 2005

• 道路情報板を活用した交通事故リスク情報提供によるドライバーの事故リスク情報態度・安全運転意識変化の継続効果の検証
  兵頭知,西内裕晶,倉内慎也,吉井稔雄,大藤武彦
  土木学会第64回土木計画学研究発表会・秋大会, Dec. 2022, Japanese
• 交通事故リスクに関するコミュニケーションが経路選択行動に与える影響の分析
  安隆浩,倉内慎也,吉井稔雄,西内裕晶,佐野可寸志
  土木学会第64回土木計画学研究発表会・秋大会, Dec. 2022, Oral presentation
• カーボンニュートラル実現に向けた交通都市計画
  吉井稔雄
  第18回「明日の四国作りを考える市町村長の会」, 02 Nov. 2022, Public discourse
  [Invited]
• 定住促進に向けた景観価値の認識と場所愛着関する研究
  寺川佳奈子; 渡邉友泰; 白柳洋俊; 倉内慎也; 吉井稔雄; 坪田隆宏
  土木学会四国支部 令和4年度技術研究発表会, May 2022, Japanese, Oral presentation
• まちづくりを巡るメタステレオタイプ的情報がステレオタイプに与える影響分析
  野添愛美; 白柳洋俊; 倉内慎也; 吉井稔雄; 坪田隆宏
  土木学会四国支部 令和4年度技術研究発表会, May 2022, Japanese, Oral presentation
• トンネル照明灯具の劣化診断の精度向上に関する研究
  奥村尚登; 村井遥己; 坪田隆宏; 吉井稔雄
  土木学会四国支部 令和4年度技術研究発表会, May 2022, Japanese, Oral presentation
• 競合危険モデルによるトリップ発生間隔のモデル化
  多久和昌宏; 倉内慎也; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木学会四国支部 令和4年度技術研究発表会, May 2022, Japanese, Oral presentation
• エリア交通流状態における渋滞領域の出現検出手法
  髙田啓介; 森本裕治; 吉井稔雄; 坪田隆宏; 堀口睦美
  土木学会四国支部 令和4年度技術研究発表会, May 2022, Japanese, Oral presentation
• 畳み込みニューラルネットワークによる都市間高速道路の渋滞発生予測モデル
  坪田隆宏; 砂侑奈; 吉井稔雄
  土木計画学研究発表会, 2022, Japanese, Oral presentation
• トンネル照明取付具の劣化診断の精度向上に向けたデータ拡張方法の検討
  奥村尚登; 村井遥己; 坪田隆宏; 吉井稔雄
  土木計画学研究発表会, 2022, Japanese, Oral presentation
• ANALYSIS ON THE EFFECT OF FEAR OF DRIVING ON EXPRESSWAYS TO ROUTE CHOICE BEHAVIOR
  長坂奈月; 倉内慎也; 吉井稔雄; 藤原章正
  土木計画学研究発表会, 2022, Japanese, Oral presentation
• 運輸部門におけるカーボンニュートラル実現に向けた交通都市計画
  清広晃輝; 吉井稔雄; 倉内慎也; 坪田隆宏; 白柳洋俊
  土木計画学研究発表会, 2022, Japanese, Oral presentation
• 道路情報板を活用した交通事故リスク情報提供とドライバーの意識に関する分析
  西内裕晶,大藤武彦,兵頭知,倉内慎也,吉井稔雄
  第34回日本道路会議, Sep. 2021, Japanese
• ネットワーク交通流ブレイクダウン判定方 法の構築
  森本裕治
  第41回交通工学研究発表会, Aug. 2021, Japanese
• Effect of a Safety Route Guidance System on Network Traffic Safety
  吉井 稔雄
  Seminar on Advanced Traffic Management for Smart Mobility, 19 Sep. 2019, Public discourse
  [Invited]
• Effect of a Safety Route Guidance System on Network Traffic Safety
  吉井 稔雄
  French-Japanese Seminar on Simulation of On-Ground Mobility in Critical Situations, 17 Sep. 2019, Public discourse
  [Invited]
• 事故リスクを用いた交通マネジメントについて
  吉井 稔雄
  外部講師勉強会, 19 Aug. 2019, Public discourse
  [Invited]
• 安全性向上に向けた自転車のマナー
  吉井 稔雄
  自転車交通マナーアップ会議, 16 Feb. 2019, Japanese, Public discourse
  [Invited]
• 事故リスクとエリア交通マネジメント
  吉井 稔雄
  大分県警, 29 Jan. 2019, Japanese, Public discourse
  [Invited]
• 交通事故リスクを活用した交通マネジメント
  吉井 稔雄
  これからの北海道における道路交通安全, 14 Nov. 2018, Japanese, Public discourse
  [Invited]
• 交通事故リスク活用した交通マネジメント
  吉井 稔雄
  首都高速勉強会, 31 Aug. 2018, Japanese, Public discourse
  [Invited]
• 交通事故リスクを活用した交通マネジメント
  吉井 稔雄
  北海道開発局道路部門勉強会, 15 Jun. 2018, Japanese, Public discourse
  [Invited]
• EFFECT OF PAVEMENT CONDITIONS ON ACCIDENT RISK IN RURAL EXPRESSWAYS
  坪田隆宏; 吉井稔雄; 白柳洋俊; 倉内慎也
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• 交差点における事故リスク推定モデルの構築
  岡田洋晃; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• プローブデータを活用したMFDの特性及び要因に関する基礎的研究
  尾高慎二; 吉井稔雄; 藤井浩史; 神戸信人
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• まちなか回遊時の記憶痕跡が主観的時間の歪みに与える影響
  白柳洋俊; 倉内慎也; 坪田隆宏; 吉井稔雄; 大田菜央
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• 高速道路における事故に対する認知バイアスの分析とその解消法の検討
  倉内慎也; 小川晃平; 吉井稔雄; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• 生活道路単路部における事故リスク推定モデルの構築
  小川晃一; 吉井稔雄; 坪田隆宏; 白柳洋俊
  土木計画学研究・講演集(CD-ROM), 28 May 2018, Japanese, Oral presentation
• ETC2.0データを活用した都心部におけるMacroscopic Fundamental Diagramに関する研究
  尾高慎二; 吉井稔雄; 神戸信人
  土木計画学研究・講演集(CD-ROM), 20 Oct. 2017, Japanese, Oral presentation
• 交通事故リスク，交差点運用（信号機運用）について
  吉井 稔雄
  大分県警察交通管制センター交通事故・規制関係研修会, 25 Aug. 2017, Japanese, Public discourse
  [Invited], [Domestic Conference]
• 交通事故リスクの観点から見た階層型道路ネットワークの有用性
  吉井 稔雄
  階層型道路ネットワークの実現に向けて, 08 Nov. 2016, Public discourse
  [Invited]
• Mitigation of Traffic Congestion
  YOSHII Toshio
  TREPSEA 2016, 22 Sep. 2016, English
  [Invited]
• 道路利用効率を最大化する都市内の車両台数に関する考察
  吉井 稔雄
  愛媛県道路利用者会議, 28 Aug. 2016, Public discourse
  [Invited]
• 都市内の適切な車両台数に関する考察
  吉井 稔雄
  建設技術研究所セミナー, 26 Aug. 2016, Public discourse
  [Invited]
• 都市における最適な車両台数に関する考察
  吉井 稔雄
  都市計画研究講演集, Apr. 2016, Japanese
  [Invited]
• 新居浜駅周辺のまちづくりフォーラム
  吉井 稔雄
  新居浜駅周辺のまちづくりフォーラム, 29 Nov. 2015, Nominated symposium
  [Invited]
• Accident Risk Simulation, University of Leeds
  YOSHII Toshio
  Invited Lecture, Institute for Transport Studies (ITS) University of Leeds, 11 Jul. 2014, English
  [Invited]
• いい加減の交通制御を目指して
  吉井 稔雄
  人工知能学会全国大会 松山, 15 May 2014, Japanese
  [Invited]
• Development of an Area Metering Control Method using Macroscopic Fundamental Diagram
  YOSHII Toshio
  INTERNATIONAL SYMPOSIUM on INTELLIGENT TRANSPORT SYSTEMS RESEARCH, 14 Apr. 2012, English
  [Invited]
• Symbolization of intersections using alphabet signs
  YOSHII Toshio
  Workshop on Transportation Researches for Urban Safety, Dec. 2008, English
  [Invited]
• 「利用者均衡配分と動的シミュレーションの適用」動的シミュレーションの有効な展開
  吉井 稔雄
  Jul. 2006, Japanese, Public discourse
  [Invited]
• 「交通シミュレーション ～適用マニュアルの解説と今後の展望」適用マニュアル解説(1)
  吉井 稔雄
  第73回交通工学講習会, Jul. 2006, Japanese, Public discourse
  [Invited]
• 集計QKを用いたエリア交通管制システム
  吉井 稔雄
  UTMSセミナー2011, Japanese, Public discourse
• Dynamic network traffic simulation: Theory and applications
  YOSHII Toshio
  International Symposium of Transport Simulation 2006, English
  [Invited]

• 計画数理学特論, 2024年, 修士課程, 工学院
• 計画数理学特論, 2024年, 博士後期課程, 工学院

• 都市計画学会
• ITS
• 交通工学研究会
• 土木学会

• 路側・車載機器による観測や気象データを融合解析する道路交通デジタルツイン
  科学研究費助成事業
  01 Apr. 2025 - 31 Mar. 2029
  高橋 翔; 小川 貴弘; 杉浦 聡志; 萩原 亨; 吉井 稔雄
  日本学術振興会, 基盤研究(B), 北海道大学, 25K01337
• Development of real-time traffic accident risk reduction system on expressways during the transition period of autonomous driving
  Grants-in-Aid for Scientific Research
  01 Apr. 2024 - 31 Mar. 2028
  室町 泰徳; 吉井 稔雄; 瀬尾 亨
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Tokyo Institute of Technology, 24K01003
• Development of a network traffic breakdown prediction method
  Grants-in-Aid for Scientific Research
  01 Apr. 2021 - 31 Mar. 2024
  吉井 稔雄; 坪田 隆宏; 塩見 康博; 西内 裕晶; 川崎 洋; 小野 晋太郎
  本研究では，交通事故や自然災害などの突発事象に起因する非日常の激しい交通渋滞（以下“Breakdown”）の未然防止に向けて，空間モニタリング技術，交通流解析手法，ならびにAIによる情報解析技術を組み合わせた，道路ネットワーク交通流におけるBreakdown発生予測手法を構築することを目的とする．令和3年度においては，以下の研究を行った．
  1)交通流観測データとプローブ車両走行軌跡を用いて，ネットワークの交通流状態における交通密度と交通量の関係を示すMFDを推定する手法を確立した．さらに，長期間蓄積されたこれらのデータと交通事故の記録を用いて，OD交通量の変化や交通事故発生によるMFD形状の変化を把握した．
  2)AIを用いたネットワークブレイクダウン予測手法の構築に向けて，ネットワークの交通流状態をマクロに捉えるエリアトラフィックステートを指標として，ブレイクダウン発生の有無を判定する手法を開発し，その精度を検証した．
  3)AI技術を用いた動的交通事故発生リスク推定モデルを適用して，道路ネットワーク全体が潜在的に有する交通事故発生リスクをリアルタイムで推定する手法を構築し，実交通データに適用してその精度を検証した．
  4)道路ネットワーク上を走行するプローブ車両のDR画像をリアルタイムでサイバー空間に収集し，リアルタイムレンダリング技術に基づく画像解析を行って道路障害物の存在や路面浸水といった通行障害となるインシデント発生の検出あるいは発生可能性を評価する技術を開発し，実データを用いた検証を行った．
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Ehime University, 21H01457
• Redevelopment of theory in transport management during synergistic torrential rainfall disaster and its social implementation
  Grants-in-Aid for Scientific Research
  01 Apr. 2019 - 31 Mar. 2023
  藤原 章正; 塚井 誠人; 張 峻屹; 坂田 桐子; 神田 佑亮; 吉井 稔雄; 嶋本 寛; 力石 真; 瀬谷 創; 浦田 淳司; 清家 美帆; 有尾 一郎
  本申請課題では，今後も頻発することが見込まれる相乗型豪雨災害時の交通マネジメントのための理論再構築と社会への実装を行うことを目的とする。研究対象を被災直後から復興期までの４つの段階に分け，行動論の立場から主としてデータ収集，心理・行動分析，政策評価を行う。開発した一連の手法をパッケージ化したソフトウェア「TMRescue」(仮称)を，独自に収集した実データに適用し，実用性を検証する。
  2021年度は、理論研究に基づきTMRescueの社会実装研究に取り掛かった。具体的には、
  ①タイムライン型避難支援アーカイブの構築に関しては，タイムラインの考え方を援用し，土砂洪水氾濫被害に対応した避難支援アーカイブを構築した。被災者の意識や行動に関する自由回答形式のアンケート調査とSNSのテキストデータを取得し，機械学習手法の一つであるトピックモデルを適用して，住民避難の阻害要因を特定した。
  ②災害時の動的交通情報提供システムの構築に関しては，災害発生後の公共交通運行の動的な交通情報提供システムを構築した。被災地区において居住地と避難所を結ぶグリーンスローモビリティによる移動支援の実験を行い，交通規制時の情報配信プラットホームを試行した。
  ③時間・空間的集積を考慮した交通マネジメント施策の決定に関しては，災害時に関係者が自由にアクセスできるオープンデータとして，需給マッチング技術および需給均衡点の予測技術に公共交通情報提供技術を同期させ，被災後のTDM×TSMを実現するサービスコンテンツを試作した。
  ④交通ネットワークの復旧優先度決定支援システムを用いた施策の評価に関しては，復旧優先度決定支援システムを相乗型豪雨災害の復旧・復興過程に適用し，道路区間の抽出，優先順位，交通容量の回復水準の妥当性について検証した。また，短時間で敷設可能な緊急仮橋モバイルブリッジの敷設効果を定量化した。
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hiroshima University, 19H00784
• Optimization of freeway traffic flow with exogenous control of autonomous vehicles
  Grants-in-Aid for Scientific Research
  01 Apr. 2019 - 31 Mar. 2022
  塩見 康博; 柳原 正実; 服部 宏充; 吉井 稔雄; 瀬尾 亨
  本研究は，将来的なコネクティッド車両や自動走行車両（CA車両）の普及を想定し，交通管制側からCA車両の挙動を介入的に制御することで，渋滞発生の緩和，ショックウェーブの解消，それに伴う事故防止のための交通流マネジメント手法に関わる諸要素の理論構築を行う．とりわけ，従来の研究では考慮されていなかった車線変更を含むCA車両と一般車両の相互作用や，現実的なリアルタイムデータ取得環境を考慮した上で，ロバストな制御効果を得ることを目標とする．そのための個別課題として，具体的には，1)深層学習を用いたデータ駆動型車両挙動モデルの開発とミクロ交通流シミュレーションへの実装，2)多種データの融合利用による全車両走行軌跡を動的に推定する手法の構築，3)モンテカルロ木探索を用いた車線変更を含むCA車両の挙動制御アルゴリズムの開発，に取り組んだ．
  1)に関しては，前年度に構築したプロトタイプモデルをベースに，入力変数の精緻化とモデルの改良を行った．学習させるデータとしては，阪神高速道路が提供する車両走行軌跡データ（ztd）を用いた．その結果，時空間的なダイナミクスを表現できるような形で入力データを構造化することで，精度の向上が可能であることが明らかとなった．
  2)に関して，昨年度まで使用していた交通流シミュレータでは，一旦，シミュレーションを停止してから車両を再配置してリスタートする際に，全車両の速度がリセットされる，ということが，推定精度を大きく低下させることが課題となっていた．そのため，シミュレーションのホットスタート機能と特定車両への介入制御機能を追加する取り組みをおこなった．
  3)については，ボトルネックにおける交通状態を感知し，それに応じて上流区間でCA車両に対して車線変更を誘導するアルゴリズムを構築した．また，シミュレーション分析により．ショックウェーブの緩和が可能であることを示した．
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Ritsumeikan University, 19H02268
• Mathematical Modelling of ransport Network Management under Large Scale Natural Disaster
  Grants-in-Aid for Scientific Research
  01 Apr. 2017 - 31 Mar. 2021
  Asakura Yasuo
  This research aims to build a theoretical basis for the management of wide-area transport networks in the event of a large-scale natural disaster that greatly exceeds the people's daily activity area. We focused on the problems related to emergency wide-area evacuation within about one week after the disaster and the problem of supplying daily supplies to evacuees. We have achieved followings; (1) formulation of a common theoretical foundation for transportation network management in the event of a disaster,(2) establishment of a management theory for wide-area evacuation and transportation of daily necessities and (3) a case study ofintegrated wide-area evacuation and transport supply of daily necessities.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Tokyo Institute of Technology, 17H01297
• Derivation of predictive distribution of bridge deterioration using maximum entropy theorem
  Grants-in-Aid for Scientific Research
  01 Apr. 2016 - 31 Mar. 2018
  Chun Pang-jo; Yoshii Toshio; Kusumoto Masahiro
  This research aims to improve the degradation prediction method required for bridge asset management. First, we investigated which parameters affect bridge degradation. As a result, it is found that the bridge deterioration is affected by the difference in the management organization. It is said that the distance from the coastal line affects very much, however, it is only a certain degree of influence according to the analysis of inspection data. Rather, it was suggested that initial defects may have a large effect on degradation.
  
  
  To evaluate the tail risk of the bridge deterioraton, it is required to derive the detailed tail of the predicion distribution. We realize it by using hierarchical Bayesian model. As a result, it became possible to evaluate the tail risk as mentioned in the research plan, as well as to present the optimal inspection interval for each individual bridge.
  Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Ehime University, 16K18170
• Network traffic management focussing on Breakdown Risk using MFD
  Grants-in-Aid for Scientific Research
  01 Apr. 2015 - 31 Mar. 2018
  YOSHII TOSHIO
  A method of evaluating the risk is developed, which consists of traffic congestion risk, traffic accident risk, and environmental risk, when the network traffic flow breakdown phenomenon occurs. As for the evaluation of traffic congestion risk, we develop a network traffic simulation model which can deal with the demand change by incorporating the driver behavior model. The traffic accident risk and environmental risk are evaluated based on the output of the simulation model. A hysteresis analysis of the aggregated QK was carried out, and MFD on road networks in the center of the capital of 47 prefectures are analyzed for understanding their characteristics.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Ehime University, 15H04061
• A study on driving behavior and its assistance for enhancement in safe mobility in aging society
  Grants-in-Aid for Scientific Research
  01 Apr. 2014 - 31 Mar. 2017
  UNO NOBUHIRO
  This study is regarded as an initial academic step aiming at enhancement in both mobility for elderly people and traffic safety and hereby consists of three themes below. 1) The major road and traffic factors have been extracted by statistical analysis of accident records, data of road structure and alignment and traffic data mainly focusing on the sections with large number of accidents. 2) Assuming road traffic environment with higher accident risk, this study has attempted to clarify the both positive and negative impacts of driving assistance systems using ITS. 3) This study has attempted to investigate travel behavior and needs for mobility especially of elderly people at the area with lower LoS of public transportation services in addition to the risk recognition of traffic accidents.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kyoto University, 26289175
• Development of Theories on Dynamic Travel Behaviour and Traffic Flow Analysis for Transport Network Risk Management
  Grants-in-Aid for Scientific Research
  01 Apr. 2013 - 31 Mar. 2017
  Asakura Yasuo
  Our modern society has required dynamic risk management for transport network to minimize the negative effects of a system failure caused by traffic incident and/or natural disaster. This study aims to establish theoretical basis of advanced travel behaviour analysis and transport network analysis for dynamic risk management of transport network. Four years research with 14 researchers has achieved to develop advanced methods in travel behaviour survey based on the Probe Person survey, and to establish dynamic network traffic flow analysis methods by utilizing travel and traffic data with higher resolution. We have contributed to investigate fundamental theories on dynamic risk management of transport networks incorporating advanced travel behaviour models into dynamic network flow models. As a part of research activities, some of the research members organized three international symposiums in the field of traffic and transport theories in 2015 and 2017.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Tokyo Institute of Technology, 25249070
• Development of Simukation Model for Evacuation from a Nuclear Powerpolant
  Grants-in-Aid for Scientific Research
  01 Apr. 2013 - 31 Mar. 2016
  SANO KAZUSHI; NISHIUCHI Hiroaki; YOSHII Toshio; Wisetjindawat Wisinee
  We have estimated evacuation time caused serious damage at Kashiwazaki-Kariha nuclear power plant by using a micro-traffic simulator “PARAMICS”. We conducted questionnaire survey to residents who stayed within 30 km from the power plant, and clarify their behavior just after the serious incident happened. We made an OD table by using the result of questionnaire survey and Road Census Data conducted by Ministry of Land, Infrastructure and Transportation. We simulated the situation and pointed out the bottle neck for the evacuation. We evaluate the plans to reduce the evacuation time, such as increment of the number of the lane and construction of smart inter change, and confirm the reduced evacuation time.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Nagaoka University of Technology, 25420537
• Theoretical system incorporating with mobile observation and simulation for evaluating risks of transport networks in hazardous situation
  Grants-in-Aid for Scientific Research
  01 Apr. 2009 - 31 Mar. 2013
  ASAKURA Yasuo; HATO Eiji; YAMAMOTO Toshiyuki; NAKAYAMA Shoichiro; YOSHII Toshio; IRYO Takamasa; MARUYAMA Takuya; AKAMATSU Takashi; TATANO Hirokazu; NAGAE Takeshi
  The purpose of this study is to develop and validate a theoretical system for evaluation of transportation network reliability considering natural disasters. Based on outcomes of our previous research conducted in Grant-in-Aid for Scientific Research (A) (Research Project Number: 17206053), we developed "Data collection and its analysis systems for travel behavior" and "Evaluation theories for reliability of road network in natural disasters". These systems and theories were realized by incorporating the following three parts: (i) Behavioral survey and analysis considering situations in a disaster, (ii) Traffic simulation on transportation network affected by disaster, and (iii) Evaluation model for reliability utilizing traffic simulation. The proposed system was confirmed to be applicable for evaluating transportation network reliability considering possible natural disasters in Japan.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), 21246081
• A STUDY ON METHODOLOGY FOR EVALUATION AND MANAGEMENT OF VARIATION IN LEVEL OF SERVICE OF ROAD TRANSPORTATION BASED ON TRAVEL TIME RELIABILITY
  Grants-in-Aid for Scientific Research
  2009 - 2011
  UNO Nobuhiro; YOSHII Toshio; KURAUCHI Fumitaka; KIKUCHI Akira; SHIMAMOTO Hiroshi; SHIOMI Yasuhiro; YAMAZAKI Hiroki
  This study proposes a set of methodologies to analyze and evaluate the Level of Service(LoS) provided by road transportation system and its variation under the availability of rich dynamic traffic data. In addition, this study proposes countermeasures for traffic management to enhance the LoS of road transportation system. Major outcomes of this study are as follows. 1) We develop the methodology to evaluate the LoS of road transportation system based on the concept of travel time reliability of network. 2) This study suggests that provision of distribution information on travel time might helpful for enhancement in traffic management.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kyoto University, 21360245
• Development of a Multi Agent Participatory Simulation System with Social Interaction
  Grants-in-Aid for Scientific Research
  2008 - 2011
  YOSHII Toshio; KIKUCHI Akira; UNO Nobuhiro; FUJII Satoshi; YAMAMOTO Toshiyuki; OKUSHIMA Masashi; NAKAYAMA Shoichirou; KURAUCHI Shinya
  In this research, the multi agent travel behavior simulation system endogenizing social interaction is developed and we apply this system to the influence analysis for traffic regulations under road maintenance and the analysis of pro-environmental behavior. Moreover, extending this simulation system, we propose the experiment simulation system with participatory simulation technology that includes subjects in traffic simulation. And we developed a simple integrated model to account for endogenous changes in land-use and public-transportation-LOS for long-term demand prediction with simulation system.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), 20246084
• 到着過程の確率的変動を考慮した交通容量推定方法の構築
  科学研究費助成事業
  2007 - 2008
  吉井 稔雄; 北村 隆一; 菊池 輝; 塩見 康博
  平成19年度の成果,1)渋滞生起確率の定義,2)希望走行速度の異なる車両が混在する場合に,時間経過とともに変化する車群形成・拡散モデル,3)観測された走行速度と車群台数分布から希望走行速度分布を推定するモデル,について,実データを用いた検証を行った.具体的には,実観測による交通流データから,各交通需要レートの時に渋滞が発生した割合を算出し,この2つの値の適合状況を調べ渋滞生起確率の現状再現性を検証した.また,現実のボトルネックを対象とした観測データを用い,希望走行速度分布を推定,推定された希望走行速度の確率分布に基づいて,需要発生レートと渋滞生起確率の関係を求めた.その結果,本研究が提案する渋滞生起確率が現実の交通現象を適切に表現していること,ならびに構築したモデルがいずれも十分な妥当性を持つことを示した.
  本研究によって,車両挙動のバラツキを以て渋滞発生という確率現象の一部を説明することが出来たと考えられる.すなわち,1台1台のミクロな車両挙動に着目し,車両挙動の確率的なバラツキを以て交通容量(より正確には「渋滞発生時交通量」)の確率的変動を説明する新しい交通流理論を創設した.
  この成果により,これまでの流体力学理論が交通流とオキュパンシーという車両感知器から獲得される従前のデータとうまく調和し長く実務に利用されてきたのに対し,本研究による確率論的交通流理論では,個々の車両挙動のバラツキを取り扱うことから,AVIやプローブカーといった新しい観測・調査技術との調和が期待できる.すなわち,新しい理論に基づいた知見を活用することで,これらの観測・調査データを利用した全く新しい交通制御・運用・管理手法が生み出されることが期待される.
  日本学術振興会, 萌芽研究, 京都大学, 19656125
• A Study of Diagnosis and Evaluation System for Level of Serviceof Road Transportation Using Advanced Observation Technologiesof Traffic Flow
  Grants-in-Aid for Scientific Research
  2006 - 2008
  UNO Nobuhiro; YOSHII Toshio; YAMADA Tadashi; KURAUCHI Fumitaka
  本研究ではITを利用した車両走行挙動に関する観測システムを用いて, 道路網の交通サービスの質を多面的に評価し, サービス水準向上策の選定に資する総合的な診断評価システムの構築を試みた. バスプローブデータ等を用いて, 所要時間信頼性の考え方に基づき, 道路構造・運用, 交通需要特性等の影響も加味した形で, サービス水準の評価方法を構築した. 交通錯綜部のサービス水準診断・評価に, 画像観測データを適用し渋滞発生メカニズムの解明法を提案するともに, 交通シミュレーションの基礎モデルとして, 車両間の多様性を考慮した追従モデルを構築した.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kyoto University, 18360245
• A system evaluating risks of transport networks in hazardous situations based on measurements by mobile communication instruments
  Grants-in-Aid for Scientific Research
  2005 - 2008
  ASAKURA Yasuo; HATO Eiji; IRYO Takamasa; TATANO Hirokazu; NAGAE Takeshi; AKAMATSU Takashi; YOSHII Toshio; YAMAMORTO Toshiyuki; NAKAYAMA Shoichiro
  情報通信技術の高度化に伴い,GPS,携帯電話,PHS などの移動体通信システムの利用者数は飛躍的に増加しつつある.移動体通信による位置特定機能を用いると,機器を携帯する個々のヒトの位置特定が可能であり,過去数年の間に移動体通信機器を利用した交通行動調査手法が数多く提案されてきている.移動体通信を利用したヒトの交通行動の観測と分析手法については,1998 年に研究代表者らがITS 世界会議で発表した論文を皮切りに国内外で研究が進められている.国内ではプローブ車両による道路交通流の観測に代表されるように,実務面でも移動体観測への関心が高まっている.しかしながらこれに関連する既往研究のほとんどは平常時の交通行動を対象としたものであり,災害時を想定した観測システムの開発や分析手法に関する研究は見られない.
  一方,災害時の交通ネットワークのリスク評価に関しては,多様なアプローチから研究されてきているが,災害時の交通行動に関する実証データを得ることが困難であるために,実際の交通ネットワークを対象としたリスク評価研究の蓄積は必ずしも十分ではない.移動体通信機器を応用して災害時の交通行動を,災害を模した状況において実証的に把握することは,災害時の交通ネットワークのリスク評価の信頼性をより高め,また,より精緻な場面への応用ができるようになることが期待されよう.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Kobe University, 17206053
• Development of a new traffic assignment method on hybrid road network
  Grants-in-Aid for Scientific Research
  2006 - 2007
  YOSHII Toshio; KITAMURA Ryuichi; KIKUCHI Akira
  This research proposes a new traffic assignment method on the hybrid road network which consists of two types of links, one is "aggregate link" that represents many routes and mainly deals with streets, the other is "arterial link" that represents the road section and mainly indicates arterials. The simplified network can be formed with smaller number of links comparing to one including all roads, arterials and streets. This research shows the equivalence between the assignment on the simplified network and on the network of all roads on the assumption and using the special utility function in the route choice model. As for the assumption, the study is assuming that the cognitive travel time of all routes from Origin to Destination is the same within the streets area, which is surrounded by arterial links. On the other hand, the special utility function is adopted that can be divided into several road sections. Moreover, a traffic simulation model is established, which can estimate dynamic user equilibrium flow approximately on the hybrid road network.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kyoto University, 18360246
• A Study on Evaluation of Traffic Information Considering Interference between Divers under Uncertainty
  Grants-in-Aid for Scientific Research
  2005 - 2007
  KITAMURA Ryuichi; YOSHII Toshio; KIKUCHI Akira
  Proposed in this study is a measure of the perception of travel time variability, perceived travel time bandwidth. Results of a six-week diary survey of expressway users in the Osaka metropolitan area of Japan have revealed that perceived bandwidth explains the variation in safety margin more than does the standard deviation of recorded travel times, that the perception of variability is important in explaining travel decision, and that an objective measure of variability, such as the standard deviation of travel times, may not he an effective variable to account fur traveler' decision under uncertainty.
  The analyses of experimental data, obtained from 76 subjects, lend support to some of the hypotheses postulated on the perception of representative travel time. It has shown that availability by recentness applies in the perception of representative travel time before habitualization. The results have also shown that the association between perceived representative travel time and experienced travel times weakens after habitualization. Neither availability by extremity nor anchoring has been demonstrated by the analysis of the experimental data.
  The numerical examples of this study provide results that improvements in network flow are negligibly small even when precise information on travel time is provided. In case where no predictive travel time information is present, results of agent-based route choice simulation indicate that higher levels of drivers' cognitive capabilities tend to produce more self-organization of drivers and stable network flows. It is also shown that information on routes that a driver did not take is important for this self-orgarnization. Simulation results also indicate that predictive travel time information is ineffective even when it is accurate.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kyoto University, 17360246
• Development of Micro-simulation Model for Urban Goods Movements
  Grants-in-Aid for Scientific Research
  2005 - 2006
  SANO Kazushi; MATSUMOTO Shoji; YOSHII Toshio; KATO Hironori
  The objective of this study is therefore to develop a model that focuses on the behavioral level of freight transportation. The proposed model considers the individual behavior of freight agents and their interactions in supply chain resulting in the model's capability to reflect the real mechanism of freight movement. The proposed model is a modification of the traditional four-step approach in that it considers the behavior of each freight agent individually. The study utilizes micro-simulation as an approach to the modeling, considering the behavior of each firm individually. The model structure consists of four stages : commodity production and consumption, commodity distribution, conversion of commodity flows to truck flows, and traffic assignment.
  Since the model considers the individual behavior of freight agent, the model can be applied to both static and dynamic of freight transportation system. Static model results the average number of truck trips of each origin and destination; on the other hand, dynamic model concerned the dynamic process of freight movement that varies according to trend in consumption. In addition, several phenomena in economic (such as bull-whip effect) and seasonal variation in freight traffic demand can be captured by the dynamic multi-agent freight model. The proposed model has been applied to analyze the urban freight transportation in the Tokyo Metropolitan Area. This study discusses the issues involved in model development and validation including conceptual framework, mathematical formulations, estimated results, and validation results. In addition, the model was also tested for its capability by applying to evaluate two proposed scenarios. The results show that the model is applicable to capture the responsive behaviors of freight agents that accompany the travel pattern changes.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Nagaoka University of Technology, 17560470
• プロスペクト理論を用いた不確実性下における交通行動の分析
  科学研究費助成事業
  2004 - 2005
  北村 隆一; 吉井 稔雄; 菊池 輝
  本年度は,所要時間の不確実性を確率分布により表現するという立場から,実所要時間分布から認知所要時間分布を推定する手法を開発した.実所要時間分布と認知所要時間分布との関係性を記述する有効な数理モデルとしてあげられるのが,Kahneman and TverskyやPrelecにより提案されているウエイト関数である.ウエイト関数は,「不確実性下において意思決定者は,実際に生起する確率をそのまま認知している訳ではなく,何らかのバイアスを持って認知している」ことを数理モデルで表現するものである.ウエイト関数を用いることにより,不確実性に対する態度を記述することが可能であり,パラメータ推定値から実所要時間分布がどのようなバイアスを持って認知されているのかを明らかにすることが可能となる.
  このウエイト関数を用いて,昨年度実施したダイアリーアンケート調査ならびに今年度実施した室内実験のデータにより,実所要時間の平均値・標準偏差と認知所要時間から認知所要時間分布を推定した.Kahneman and Tversky型ウエイト関数・Prelec型ウエイト関数ともに,そのパラメータ推定結果からは次の知見を得た:(1)早い所要時間の生起確率は実際よりも小さく認知する,(2)遅い所要時間の生起確率は実際よりも大きく認知する,(3)平均値付近の生起確率は実際よりも大きめに認知される.「所要時間が大きくなるほどその生起確率を大きく認知する」「実所要時間平均値周辺の生起確率は実際よりも大きく認知する」というように形で通勤者が不確実性を認知しているという結果は,現実問題として制約時刻の存在する通勤行動では妥当な結果であり,意思決定者の認識の歪みを考慮することで,交通行動の解釈の幅を広げると考えられる.
  日本学術振興会, 萌芽研究, 京都大学, 16656154
• International comparison on characteristics of travel behaviour in congested network
  Grants-in-Aid for Scientific Research
  2004 - 2005
  ASAKURA Yasuo; KUWAHARA Masao; YOSHII Toshio; IRYO Takamasa; HATO Eiji; NAGAE Takeshi
  This research intends to obtain empirical knowledge of travellers' behaviour in congested network in cities in the world. This research developed a methodology for measuring degree of congestion in cities with lower cost. Applying Wardrop's theory of equilibrium, it intends to reduce the number of links to be measured. Static information of the network, such as nodes, links, free flow travel time of links, and topological information of their connectivity, is assumed to be obtained beforehand. The links to be measured are determined by this information. Using this methodology, travel times of links where measurement is not made can be estimated from the result of measurement of travel time on limited links.
  The methodology explained above is described by route based theory and therefore enumerating all possible routes between each O-D pairs is necessary. However, it is known that enumerating all routes is not realistic due to calculation cost. This theory provides a method to finish calculations without such enumerations. On the other hand, travellers in the real world may not have ability to enumerate all possible routes between their origins and destinations. They may choose their routes from the limited options they can consider. Considering such behaviour of travellers, this study shows an algorithm to extract route choice options of travellers from all possible routes. This method was checked by empiricl test.
  The empirical surveys were made in the selected cities in the world. Travel time of the networks was obtained by GPS-equipped cars. Travel time of all links of the networks has been obtained. Comparing this result with the methods shown above, characteristics of congestion and travel behaviour in congested network can be obtained.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kobe University, 16404014
• Development of optimal traffic signal control tools which consider environmental aspect
  Grants-in-Aid for Scientific Research
  2003 - 2004
  YOSHII Toshio; KUWAHARA Masao; ODA Toshihiko; HORIGUCHI Ryota; KIKUCHI Akira
  This research tries to establish the new signal control strategy so as to minimize automobile emissions.
  AVI(Automated Vehicle Identification system), probe vehicle and other new technologies are used to achieve the new signal control system, and this study 1)constructs the signal control system which utilizes new observation technology, 2)proposes the new estimation method of the volume of automobile emissions, and 3)establishes the signal control system which considers environmental aspect.
  Results are shown respectively below.
  1)The new signal control strategy is proposed using on-line and off-line data, which can be obtained from AVI, movable detector and probe vehicle, and its effectiveness is verified.
  2)The estimation method of the volume of automobile emissions is constructed, which utilizes the trajectory data from probe vehicle.
  3)The difference between signal controls for minimizing total delay and CO_2 emission at isolated intersection is shown, and using results from (1) and (2), a signal optimization method which minimizes the volume of the emission of CO_2 is established.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), KYOTO UNIVERSITY, 15360282
• Measurement of the Effects of Intelligent Transport Systems (ITS) under Different Road Network Structure : Towards International Comparison
  Grants-in-Aid for Scientific Research
  2002 - 2003
  ASAKURA Yasuo; YOSHII Toshio; KUWAHARA Masao; HATO Eiji; IRYO Takamasa
  In addition to the continuous research and development on the ITS, various actual systems have been implemented in many countries in these ten years. It is needless to mention that the measurement of the effects of ITS on traffic and transport environment is very important and interesting research issue. In particular, advanced traveler information system is one of the representative ITS, and the effects of travel information on driver's behavior in a road network should be further studied. Those effects may depend on the road network attributes such as topological structure.
  This research project intended to develop fundamental tools for the measurement of the effects of travel information on drivel's route choice behavior in a road network. The research output of this project includes travel data collection technologies, travel behavioral analysis methods and road network simulation models. Mobile communication devices and computer based survey technologies are discussed for collecting detailed and accurate travel data. Data oriented travel behavioral modeling including Data Mining approach are then studied for utilizing rich travel data. Based on theoretical studies on travel behavior and traffic flow, microscopic network simulation models are improved and calculated for estimating network wide effects of traveler information systems.
  The output of this study would contribute to compare the effects of travel information systems in different road network environment. It could be also useful for developing international standard of travel information systems. Further studies in different countries are necessary to obtain more general conclusion on the travel information and driver's behavior.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Kobe University, 14404018
• 国際研究セミナー"Behaviors in Network"の企画調査
  科学研究費助成事業
  2002 - 2002
  羽藤 英二; 吉井 稔雄; 朝倉 康夫; 赤松 隆; 桑原 雅夫; 藤井 聡
  本研究では,国際会議"Behaviors in Network"開催の企画調査を実施した.企画調査にあたってネットワーク上の交通行動に関する研究課題の分類を行なった.分類した各課題ごとにテーマを設け,2002年8月19日〜20日にかけて北海道で国際会議を前倒しで開催した.主な参加者は,ネットワーク配分の分野では,Yang, H.Wong, S.C., Iryo, T., Lam, W.H.K, シミュレーション分野では,Yoshii, T., Lo, H.P.Bekhor, S.Hato,行動モデル分野では,Lee, S.Fujii, S.Asakura, Yで,それぞれ各分野の研究成果を持ちよって議論すると共に,既往の研究課題の整理とレビューをあわせて実施した.行動モデルについては,経路重複の記述可能性と.計算可能なアルゴリズムを実装したネットワークモデルへの組み込み可能性が今後の大きな研究課題であることが示された.
  次に.2003年3月15日東北大学において,同分野の今後の方向性について,モデルとデータ,ミクロとマクロの関連性の2つにしぼって,国内の研究者を中心に今後の研究課題の展望を行った.行動モデルの分野からは羽藤,佐々木,モデルの適用可能性については井料,円山が,ミクロとマクロのモデル化については赤松,奥村が,一般均衡の枠組みにおける行動モデルの役割については上田が,その研究課題の整理とレビューを行った.隷属パラメータから考えた行動モデルとネットワークモデルの関連性や,データ取得精度や分解能の精密化によるモデルのブレークスルーへの期待が示された.
  第一線で活躍する国内外の研究者を招いた国際会議を前倒しで開催すると共に,行動モデルの研究者以外の幅広い研究者とのコミュニーケーションを実施したことで,同分野の今後の方向性についてマクロモデルやデータの取得範囲などとの関連性などの視座を整理することができたことは本企画調査の成果といえる.
  日本学術振興会, 基盤研究(C), 愛媛大学, 14605018
• Experimental Research on Risk Cognition in Driving Behavior of Automobile
  Grants-in-Aid for Scientific Research
  2001 - 2002
  OGUCHI Takashi; KUWAHARA Masao; SHIKATA Shigenori; KATAKURA Masahiko; YOSHII Toshio; AKAHANE Hirokazu
  Automobile Drivers' perception, cognition and behavior should be considered under so many conditions. The speed and distance perception and visibility of objects such as guidance signs are focused in this study, in relation with road geometry, road alignment, and surrounding traffic conditions under consideration of road safety and road efficiency (capacity). The purposes of the study are to develop a laboratory experiment system of drivers' behavior with visual technique of virtual reality and to construct the evaluation technique with the system comparing real world experiments. The drivers' cognition and behavior characteristics are tried to be examined from the view points of drivers' risk cognition.
  This year, an experimental research was carried out for a curve section with 'MSIES (moving scenery image experiment system)', which is already developed in Tokyo Metropolitan University, creating the three-dimensional computer graphics model of visual environment of drivers. The experiment consists of comparison of novices and experts of drivers, and the cases used are with/without study of traffic safety devices, the difference of types of devices (post-cone and delineator) and heights and frequencies. The other experiment was also done for evaluating the intersection guidance sign system which consists of guidance system and supplement sign made of symbols or colors. Through these experiments, some of limitation of the system become clear ; screen resolution of general-purpose computer has limitation for the purpose of evaluation of starting point of recognition of signs, and reproducibility of speed perception. The experiment system is revealed to have some potential for laboratory experiments to evaluate driver's cognition.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Tokyo Metropolitan University, 13308019
• OD交通量データの精度評価に関する研究
  科学研究費助成事業
  1999 - 2000
  吉井 稔雄
  本研究では、サンプル調査と交通量観測データを用いて推定されるOD交通量の精度について、
  1.サンプル調査から推定されるOD交通量を自動的に補正するプログラムの開発
  2.推定されたOD交通量の精度評価
  を行なった。
  1.サンプル調査から推定されるOD交通量を自動的に補正するプログラムの開発
  サンプル調査に基づいて推定されたOD交通量を、別途計測されいる定点観測データを用いて自動的に補正するプログラムを開発した。
  2.推定されたOD交通量の精度評価
  実道路ネットワークを対象として、上記プログラムを用いて推定されたOD交通量の精度評価を行なった。具体的には、データが比較的整っている
  (1)首都高速道路公団による首都高速道路交通起終点調査(平成7年度)
  (2)建設省(現国土交通省)関東地方建設局による道路交通センサス(平成6年度)
  を対象として、先に構築した○D推計モデルを用いてOD交通量を算出し、求められたOD交通量について、データ収集方法や補正方法と関係づけながら、推定されたODの精度を絶対誤差や相対誤差(標準偏差/平均値)といった指標を用いて検証した。
  その結果、両対象データともに、日単位のレベルではかなり信頼性の高い結果が得られるが、時間単位では信頼性の低い結果しか得られないということを定量的に確認した。
  日本学術振興会, 奨励研究(A), 高知工科大学, 11750468
• Estimation of a Time Dependent OD Matrix from Traffic Counts
  Grants-in-Aid for Scientific Research
  1995 - 1996
  KUWAHARA Masao; YOSHII Toshio
  We propose the model for estimating time-dependent OD matrices from traffic counts in a general network with route choice activities.
  Many dynamic traffic simulation models have been developed in order to reproduce traffic conditions and evaluate policies of traffic control, signal control, one-way traffic control and so on. Such a dynamic model needs a time-dependent OD,especially one composed of small OD zones. However, it is hard to estimate OD flows directly from OD survey. In this study, we thus propose a dynamic estimator using time-dependent traffic counts to obtain time-dependent OD volumes.
  The model consists of two parts : (1) construction of the relationship between the time-dependent OD volumes and traffic counts at links and (2) estimation of a unique time-dependent OD matrices. In the first part, we define a three-dimensional network to relate OD matrices to traffic flow on links. We then propose a method of estimating route choice probabilities. In the second part, we employ the Entropy Maximizing method for the staic OD matrices estimation and extend it to time-dependent model. As an extension, we propose a simplified method of estimating route choice probability and a method to utilize aggregated prior OD information.
  At the last, we apply the model to a test network and examine its validity.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Univ. of Tokyo, 07650613
• 交通シミュレーションの標準化
  Competitive research funding
• 交通安全に関する研究
  Competitive research funding
• 交通制御に関する研究
  Competitive research funding
• Standarization of Traffic Simulation
  Competitive research funding
• Traffic Safety
  Competitive research funding
• Traffic Control
  Competitive research funding

• 2) 情報出力プログラム，情報出力方法及び車載装置
  Patent right, 吉井 稔雄, 富士通株式会社, 国立大学法人愛媛大学
  特願2015-236011, 02 Dec. 2015
  特開2017-102741, 08 Jun. 2017
  201703016392754921
• 1) 評価方法，評価プログラムおよび情報処理装置
  Patent right, 吉井 稔雄, 富士通株式会社, 国立大学法人愛媛大学
  特願2015-104840, 22 May 2015
  特開2016-218862, 22 Dec. 2016
  201703006795420521
• 交通情報処理方法及び交通情報処理システム
  Patent right, 石田 東生; 岡本 直久; 兵藤 哲郎; 吉井 稔雄; 高野 信栄; 森 昌文; 瀬尾 卓也; 牧村 和彦, 国土交通省国土技術政策総合研究所長
  特願2002-078541, 20 Mar. 2002
  特開2003-281674, 03 Oct. 2003
  特許第3937011号
  06 Apr. 2007
  201103073232066866
• 交通情報処理方法及び交通情報処理システム
  Patent right, 石田 東生; 岡本 直久; 兵藤 哲郎; 吉井 稔雄; 高野 信栄; 森 昌文; 瀬尾 卓也; 中嶋 康博, 国土交通省国土技術政策総合研究所長
  特願2002-078560, 20 Mar. 2002
  特開2003-281685, 03 Oct. 2003
  200903048362727748
• 交通情報処理方法及び交通情報処理システム
  Patent right, 石田 東生; 岡本 直久; 兵藤 哲郎; 吉井 稔雄; 高野 信栄; 森 昌文; 瀬尾 卓也; 牧村 和彦, 国土交通省国土技術政策総合研究所長
  特願2002-078541, 20 Mar. 2002
  特開2003-281674, 03 Oct. 2003
  200903076006957708
• シミュレーション装置およびシミュレーション方法、シミュレーションプログラム
  Patent right, 桑原 雅夫; 吉井 稔雄, 株式会社アイ・トランスポート・ラボ, 桑原 雅夫, 吉井 稔雄
  特願2001-232427, 31 Jul. 2001
  特開2003-044975, 14 Feb. 2003
  200903019405442190

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