Tani Ryuichi(Faculty of Engineering　Civil Engineering　Natural Disasters and Adaptation)

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Tani Ryuichi

Faculty of Engineering　Civil Engineering　Natural Disasters and Adaptation Associate Professor

Researcher basic information

■ Degree

博士（工学）, 北海道大学, Dec. 2020

■ URL
researchmap URL

https://researchmap.jp/Ryuichi_Tani?lang=en

ホームページURL

https://jglobal.jst.go.jp/detail?JGLOBAL_ID=202101018583389164

■ Various IDs
Researcher number

80908426

J-Global ID

202101018583389164

■ Research Keywords and Fields
Research Keyword

Transportation planning

Research Field

Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention), Civil engineering plan and transportation engineering, 交通計画

■ Educational Organization

Bachelor's degree program, School of Engineering

Master's degree program, Graduate School of Engineering

Doctoral (PhD) degree program, Graduate School of Engineering

Career

■ Career
Career

Jul. 2025 - Present
北海道大学大学院工学研究院, 准教授

Apr. 2021 - Jun. 2025
北海道大学大学院工学研究院, 助教

Jan. 2021 - Mar. 2021
北海道大学大学院工学研究院, 日本学術振興会特別研究員PD

Apr. 2020 - Dec. 2020
Hokkaido University, Graduate School of Engineering, 日本学術振興会特別研究員DC2

Educational Background

Apr. 2018 - Dec. 2020, Hokkaido University, Graduate School of Engineering, Division of Engineering and Policy for Cold Regional Environment, Japan

Apr. 2016 - Mar. 2018, Hokkaido University, Graduate School of Engineering, Division of Engineering and Policy for Cold Regional Environment, Japan

Apr. 2012 - Mar. 2016, Hokkaido University, School of Engineering, Department of Socio-Environmental Engineering, Japan

Apr. 2008 - Mar. 2011, 石川県立七尾高等学校

Research activity information

■ Awards

Sep. 2025, Eastern Asia Society for Transportation Studies (EASTS), THE BEST PAPER AWARD for Theoretical Development
Bottleneck Capacity Optimization Model Considering Network-level Dynamic Evacuation Traffic
Kenshiro Oshima;Ryuichi Tani;Kenetsu Uchida

■ Papers

Optimal Toll Setting Model Considering the Spread of Semi-Autonomous Vehicles with Variable Driving Modes Within a Trip
Sorachi MATSUMOTO; Shuto KURIHARA; Ryuichi TANI; Kenetsu UCHIDA
Journal of the Eastern Asia Society for Transportation Studies, 16, 17 Feb. 2026, [Peer-reviewed]
English, Scientific journal

Effective travel time surplus maximization stochastic user equilibrium model considering travel time reliability
Shunsuke ABE; Ryuichi TANI; Kenetsu UCHIDA
Journal of the Eastern Asia Society for Transportation Studies, 16, 15 Jan. 2026, [Peer-reviewed]
English, Scientific journal

A small-scale microeconomic model to evaluate the road network policy under the mixed flow of autonomous vehicles and human-driven vehicles
Ryuichi Tani; Kenetsu Uchida
Transport Policy, 11 Aug. 2025, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal, 33018685;47703327

Operation Model for Shared Autonomous Vehicles Which Affect Congestion
Sorachi Matsumoto; Ryuichi Tani; Kenetsu Uchida
International Journal of Intelligent Transportation Systems Research, Springer Science and Business Media LLC, 08 May 2025, [Peer-reviewed]
English, Scientific journal

Reliable pathfinding problems for a correlated network: A linear programming problem in a hypergraph
Kenetsu Uchida; Yifan Wang; Ryuichi Tani
European Journal of Operational Research, Elsevier BV, 25 Apr. 2025, [Peer-reviewed]
Scientific journal

Path selection and network equilibrium under non-extreme flood disturbances
Yifan Wang; Ryuichi Tani; Kenetsu Uchida
Transportation, Springer Science and Business Media LLC, 03 Feb. 2025, [Peer-reviewed]
English, Scientific journal

A numerical solution method for the fractional moment problem within engineering
Yifan Wang; Ryuichi Tani; Kenetsu Uchida
Engineering Computations, Emerald, 03 Feb. 2025, [Peer-reviewed]
Scientific journal, Purpose

In the field of engineering, the fractional moments of random variables play a crucial role and are widely utilized. They are applied in various areas such as structural reliability assessment and analysis, studying the response characteristics of random vibration systems and optimizing signal processing and control systems. This study focuses on calculating the fractional moments of positive random variables encountered in engineering. This study focuses on calculating the fractional moments of positive random variables encountered in engineering.

Design/methodology/approach

By integrating Laplace transforms with fractional derivatives, both analytical and practical numerical solutions are derived. Furthermore, specific practical application methods are provided.

Findings

This approach allows for the stable and highly accurate calculation of fractional moments based on the integer moments of random variables. Data experiments included in this study demonstrate the effectiveness of this method in solving fractional moment calculations in engineering. Compared to traditional methods, the proposed method offers significant advantages in stability and accuracy, which can further advance research in the engineering field that employs fractional moments.

Originality/value

(1) Accuracy: Although the proposed method does involve some error, its error level is significantly lower than traditional methods, such as the Taylor expansion method. (2) Stability: The computational error of the proposed method is not only minimal but also remains stable within a narrow range as the fractional order varies. (3) Efficiency: Compared to the widely used Taylor expansion method, the proposed method requires only a minimal number of integer-order moments to achieve the desired results. Additionally, it avoids convergence issues during computation, greatly reducing computational resource requirements. (4) Simplicity: The application steps of the proposed method are very straightforward, offering significant advantages in practical applications.

Multiclass Traffic Assignment Model Considering Heterogeneous Stochastic Headways of Autonomous Vehicles and Human-Driven Vehicles
Ryuichi Tani; Teppei Kato; Kenetsu Uchida
International Journal of Intelligent Transportation Systems Research, 16 Oct. 2024, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Tourist excursion model considering trip chain choice and duration of stay
Ryuichi Tani; Haruki Shimizu; Kenetsu Uchida; Daisuke Fukuda
Asian Transport Studies, 10, Aug. 2024, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

A Method for Estimation of Traffic States Considering Floating Car Data in a Large Network
Kaifeng DUAN; Ryuichi TANI; Kenetsu UCHIDA; Keita ZUSHII; Osamu NAGAOKA
Journal of the Eastern Asia Society for Transportation Studies, 20 Jun. 2024, [Peer-reviewed]
English, Scientific journal

Estimation of macroscopic traffic flow model and traffic capacity considering road surface conditions during snowfall
Teppei KATO; Ryuichi TANI; Kenetsu UCHIDA; Kazunori MUNEHIRO
Journal of the Eastern Asia Society for Transportation Studies, 15, 346, 360, 2024, [Peer-reviewed]
English, Scientific journal

Changes in Trip and Modal Choice Importance Before and During COVID-19 in Metro Manila, Philippines
Dianne ANCHETA; Ryuichi TANI; Ken-etsu UCHIDA
Journal of the Eastern Asia Society for Transportation Studies, 15, 361, 373, 2024, [Peer-reviewed]
English, Scientific journal

Estimation of stochastic link capacity and link performance function including uncertainty of driver’s behaviour
T. Kato; K. Uchida; R. Tani; K. Munehiro
Transportmetrica A: Network Science, 01 Jun. 2023, [Peer-reviewed]
English, Scientific journal

The relationship of social vulnerability and travel behavior with COVID-19 in Metro Manila, Philippines
Dianne Pacis Ancheta; Ryuichi Tani; Ken-etsu Uchida
Asian Transport Studies, 9, 100093, 100093, Elsevier BV, Jan. 2023, [Peer-reviewed]
English, Scientific journal

Analysis of the effect of bundled airport privatization on an airline network
Ryuichi Tani; Ibuki Takashima; Teppei Kato; Toru Tamura; Kenetsu Uchida
Transport Policy, 124, 203, 211, Elsevier BV, Aug. 2022, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Travel time reliability-based optimization problem for CAVs dedicated lanes
Ryuichi Tani; Agachai Sumalee; Kenetsu Uchida
Transportmetrica A: Transport Science, 1, 32, Jul. 2022, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］
English, Scientific journal

Ridesharing Traffic Flow Model based on Link-based Kinematic Wave Theory
Ryuichi TANI; Tomoya NAKAUCHI; Kenetsu UCHIDA
Journal of the Eastern Asia Society for Transportation Studies, 14, 634, 646, 24 Jun. 2022, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

CONTINUOUS RELAXATION APPROACH FOR OPTIMAL DEPLOYMENT OF AUTONOMOUS VEHICLE DEDICATED LINKS CONSIDERING THE MIXED FLOW OF AUTONOMOUS AND HUMAN-DRIVEN VEHICLES
S. Nitta; R. Tani; K. Uchida
Proceedings of the 26th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2022, 481, 489, 2022, [Peer-reviewed]
International conference proceedings

RELIABLE SHORTEST PATHFINDING METHOD IN A CORRELATED ROAD NETWORK: HYPERGRAPH APPROACH
K. Uchida; R. Tani
Proceedings of the 26th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2022, 187, 195, 2022, [Peer-reviewed]
International conference proceedings

PATH-BASED OPTIMIZATION MODEL FOR DEPLOYING AV DEDICATED LINK
Ryuichi Tani; Sho Nitta; Kenetsu Uchida
Proceedings of the 25th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2021: Sustainable Mobility, 145, 153, 2021
International conference proceedings

A method for structuring stochastic travel time by using risk premiums of stochastic link flow
Ryuichi Tani; Teppei Kato; Kenetsu Uchida
Transportmetrica A: Transport Science, 17, 2, 212, 232, Informa UK Limited, 22 Jan. 2020, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
Scientific journal

Path Travel Time Estimating Method by Incomplete Traffic Data
Ryuichi Tani; Takashi Owada; Kenetsu Uchida
International Journal of Intelligent Transportation Systems Research, 18, 1, 43, 52, Jan. 2020, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Estimation of travel time reduction benefit considering the travel time reliability in an autonomous vehicle prevailed road network
Sho NITTA; Ryuichi TANI; Teppei KATO; Kenetsu UCHIDA
Journal of the Eastern Asia Society for Transportation Studies, 13, 664, 677, Dec. 2019, [Peer-reviewed]
English, Scientific journal

A Stochastic User Equilibrium Assignment Model under Stochastic Demand and Supply Following Lognormal Distributions
Ryuichi TANI; Kenetsu UCHIDA
Asian Transport Studies, 5, 2, 326, 348, Sep. 2018, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, Scientific journal

Financial Resources Allocation Model Considering Stochastic Travel Time in a Road Network Exposed to a Flood Risk
Ryuichi TANI; Kenetsu UCHIDA; Ichiro KIMURA
Journal of the Eastern Asia Society for Transportation Studies, 12, 94, 113, Apr. 2018, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

A method for representing variability of travel time based on stochastic link flow
Ryuichi Tani; Teppei Kato; Kenetsu Uchida
Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018, 415, 423, 2018
International conference proceedings

Reliability-based traffic assignment model considering mixed traffic flow of autonomous-connected vehicles and human-driven vehicles
Ryuichi Tani; Kenetsu Uchida
Proceedings of the 24th International Conference of Hong Kong Society for Transportation Studies, HKSTS 2019: Transport and Smart Cities, 237, 244, 2010
International conference proceedings

■ Other Activities and Achievements

Development of an integrated transportation model that considers CO₂ emissions.
山口赳史; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 80, 2024

A study on bottleneck capacity planning considering dynamic evacuation behavior
大島健志郎; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 80, 2024

Cost Surplus Maximization Stochastic User Equilibrium Model with Demand and Supply Uncertainly
阿部俊介; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 80, 2024

Development of evacuee allocation methods using discrete optimization
竹田晴輝; 内田賢悦; 峪龍一, 土木学会北海道支部論文報告集(CD-ROM), 80, 2024

A study on a multi-modal traffic assignment model for freight flows
藏本太郎; 佐藤佑樹; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

Allocation problems in public transportation networks between airports and major cities
吉留壮真; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

Inter-airport competition model considering passenger and airline behavior
勝田隆成; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

Traffic Assignment Model with Variable Demand for Mixed Flow of Fully Autonomous and Manual Driving Vehicles under Specific Conditions
田子喬一; 栗原脩斗; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

Network Design Problem Considering Road Shrinking at a Time of Decreasing Traffic Demand
勝山裕史; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

Airline Market Analysis Model with Endogenized Multi-class Equilibrium Allocation of Passengers
各務健介; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 79, 2023

ROAD NETWORK POLICY EVALUATION MODEL CONSIDERING THE MIXED FLOW OF AUTONOMOUS VEHICLE AND HUMAN-DRIVEN VEHICLE
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 67, 2023

INTER-AIRPORT COMPETITION MODEL CONSIDERING PASSENGER AND AIRLINE BEHAVIOR
勝田隆成; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

AIRLINE MARKET ANALYSIS MODEL BASED ON A MULTI-CLASS EQUILIBRIUM PASSENGER ASSIGNMENT
各務健介; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

A STUDY ON A MULTI-MODAL MULTI-COMMODITY FREIGHT ASSIGNMENT MODEL FOR HOKKAIDO-HONSHU FREIGHT NETWORK
藏本太郎; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

A DIAL-A-RIDE PROBLEM CONSIDERING ROAD NETWORK CONGESTION
松本宙千; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

TRAFFIC ASSIGNMENT MODEL WITH VARIABLE DEMAND FOR MIXED FLOW OF SEMI-AUTONOMOUS AND MANUALLY DRIVEN VEHICLES
田子喬一; 栗原脩斗; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

TRAFFIC ASSIGNMENT MODEL CONSIDERING A ROAD NETWORK WHERE TRAFFIC INFORMATION ACCURACY DEPENDS ON SUBNETWORKS
峪龍一; 加藤哲平; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 68, 2023

Optimal Operation Problem of Shared Autonomous Vehicles in Dynamic Networks
難波智也; 新田翔; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Traffic Assignment Model with Heterogeneity of Stochastic Value of Time Assuming Completely Autonomous Driving on Expressway
栗原脩斗; 新田翔; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Optimizing Airport Capacity Expansion Planning Considering Passenger Decision Making
宮島済; 新田翔; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Development of a Gridlock Avoidance Model Considering Users’ Route Choices
鐙一那; 新田翔; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Airport capacity expansion planning considering the behaviors of passengers and airlines
峪龍一; 宮島済; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 66, 2022

Improved computational efficiency of traffic srate estimation for multiple time periods on large road networks
川村雄斗; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 66, 2022

Optimum allocation of shared autonomous vehicle considering ridesharing behavior
中家碧惟; 難波智也; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 66, 2022

OPTIMAL TOLL SETTING MODEL WITH HETEROGENEOUS STOCHASTIC VALUE OF TIMES UNDER COMPLETELY AUTONOMOUS DRIVING ON EXPRESSWAYS
栗原脩斗; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 66, 2022

OPTIMAL FARE SUBSIDY MEASURES FOR A RAILWAY NETWORK CONSIDERING THE ELIMINATION OF LINE SECTIONS UNDER FISCAL CONSTRAINTS
佐藤佑樹; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 66, 2022

STOCHASTIC PREDICTION OF SNOW WIDTH BASED ON BAYESIAN INFERENCE
峪龍一; 加藤哲平; 内田賢悦; 宗廣一徳, 土木計画学研究・講演集(CD-ROM), 65, 2022

降雪時の路面状況を考慮したマクロ交通流モデルと交通容量の推定に関する研究
加藤哲平; 峪龍一; 内田賢悦; 宗廣一徳, 土木計画学研究・講演集(CD-ROM), 66, 2022

財政制約を考慮した鉄道ネットワーク維持のための運賃補助額決定モデルの開発
佐藤佑樹; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 64, 2021

Optimal Deployment Plan of Dedicated Links for Autonomous Vehicles with Considering the Travel Time Reliability.
新田翔; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 64, 2021

Real-time update of road network traffic conditions using incomplete traffic data
川村雄斗; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 64, 2021

Stochastic Estimation of Traffic Flow Parameters Considering Differences in Road Condition
峪龍一; 本田拓海; 加藤哲平; 内田賢悦; 宗廣一徳, 土木計画学研究・講演集(CD-ROM), 64, 2021

Analysis on the effects of stochastic property of traffic flow on the winter road condition in snowy-cold regions
本田拓海; 峪龍一; 宗広一徳; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Development of a Fare Subsidy Scheme to Minimize the Government Expenditure for Maintaining Railway Networks
佐藤佑樹; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Traffic state estimation in road networks with multiple time zones using incomplete observation data
川村雄斗; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Estimation of Travel Time Reduction Benefit Considering Travel Time Reliability in the Spreading Process of Automated Vehicles
新田翔; 峪龍一; 加藤哲平; 内田賢悦, 映像情報メディア学会技術報告, 45, 4(MMS2021 1-28/ME2021 1-28/AIT2021 1-28), 2021

Research of the Designing of the Critical Headway Time of Autonomous Vehicles with Considering the Efficiency and the Equity of Travel Cost in the Spreading Process of Autonomous Vehicles
新田翔; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 63, 2021

Network-level traffic state estimation method considering the multi-hourly time slots
峪龍一; 川村雄斗; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 63, 2021

高速鉄道と航空会社の協力関係が社会的便益に与える影響
芦谷雄世; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

利用者負担を考慮した公的医療施設の統廃合問題分析
原田祐輝; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

渋滞の影響を考慮したライドシェア避難モデルに関する研究
山本翔大; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

Development of a Multi-Class Traffic Assignment Model Considering Travel Time Reliability in the Spreading Process of Automated Vehicles
新田翔; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 62, 2020

A method for spatiotemporal estimation of traffic states based on probe car data and traffic counter data
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 62, 2020

自動運転車両普及後の道路ネットワークにおける移動時間信頼性を考慮した走行時間短縮便益の推計
新田翔; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

非集計行動モデルに基づいたバイクシェアリングシステムの料金設定に関する研究
寺西修一; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

自動車と歩行者の混在を考慮したライドシェア避難モデル
中内智也; 峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

TSUNAMI EVACUATION MODEL OF RIDE SHARE CONSIDERING PEDESTRIAN
中内智也; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 60, 2019

DEVELOPMENT OF ESTIMATION METHOD FOR TRAVEL TIME REDUCTION BENEFIT WITH CONSIDERING THE TRAVEL TIME UNCERTAINTY IN AN AUTONOMOUS VEHICLES PREVAILED ROAD NETWORK
新田翔; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 60, 2019

途絶に関するリンク間相関を考慮した道路ネットワークにおける通行止め期間推定モデル
高橋洋介; 峪龍一; 松田真宜; 長岡修; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

DEVELOPMENT OF EVALUATION METHOD OF TRAVEL TIME RELIABILITY BASED ON LINK FLOWS
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 57, 2018

Simple representation of road network for evaluating travel time reliability
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 58, 2018

確率的交通容量を考慮したBPR関数のパラメータ推定
加藤哲平; 内田賢悦; 峪龍一, 土木計画学研究・講演集(CD-ROM), 58, 2018

Estimation of closure duration considering correlation of the number of closure between links in road networks
高橋洋介; 峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 58, 2018

被災した道路における通行止め期間の推計モデル
峪龍一; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

A STUDY ON DISRUPTION PERIOD IN THE SECTION COMPOSED OF NATIONAL HIGHWAY AND EXPRESSWAY
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 55, 2017

USER EQUILIBRIUM ASSIGNMENT MODEL CONSIDERING CERTAINTY EAUVALENT TRAFFIC FLOW
峪龍一; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 56, 2017

対数正規分布による需要・供給の変動を考慮した確率的利用者均衡配分モデルに関する研究
峪龍一; 加藤哲平; 内田賢悦, 土木学会北海道支部論文報告集(CD-ROM), 72, 2016

常時観測データを用いた道路ネットワークの移動時間分布の推定に関する研究
内田賢悦; 峪龍一; 山田雄太; 加藤哲平, 土木計画学研究・講演集(CD-ROM), 53, 2016

道路ネットワークの被災を考慮した確率的利用者均衡配分モデル
峪龍一; 加藤哲平; 内田賢悦, 土木計画学研究・講演集(CD-ROM), 54, 2016

■ Syllabus

応用数学演習Ⅱ, 2024年, 学士課程, 工学部

Smart Transport Network, 2024年, 学士課程, 工学部

土木計画学演習, 2024年, 学士課程, 工学部

コンピューティング演習, 2024年, 学士課程, 工学部

■ Affiliated academic society

Eastern Asia Society for Transportation Studies

土木学会

■ Research Themes

Development of an Optimal Route Selection Model for Semi-Automated Vehicles Considering the Switching of Driving Mode
Grants-in-Aid for Scientific Research
01 Apr. 2024 - 31 Mar. 2027
峪龍一
Japan Society for the Promotion of Science, Grant-in-Aid for Early-Career Scientists, Hokkaido University, 24K17361

来る自動運転社会を見据えた戦略的ネットワークデザインに資する技術開発
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Apr. 2021 - Mar. 2024
内田賢悦
今年度は、自動運転社会での戦略的ネットワークデザインを念頭に置き、自動運転車両が道路ネットワークに与える影響を定量的に評価するための技術、すなわち、コネクティッドな自動運転車両の特性を踏まえた交通解析法の開発を行った。
開発した解析法は、ヒトが運転する一般車両とコネクティッドな自動運転車両が混在する道路ネットワークを対象としており、そこではそれぞれの車両が異なる経路選択行動をとると考えている。ヒトが運転する車両は、精度の高い道路ネットワーク上の交通状況を得ることが困難であると考えられるため、その経路選択行動を確率的利用者均衡配分問題として表現している。一方で、コネクティッドな自動運転車両は、精度の高い道路ネットワーク上の交通状況を得ることが可能であると考えられるため、その経路選択行動を確定的利用者均衡配分問題として表現している。ここで、確率的利用者均衡配分問題は不完全情報下の経路選択を表現するのに対して、確定的利用者均衡配分問題は完全情報下の経路選択を表現している。
また、ヒトが運転する車両とコネクティッドな自動運転車両は、異なる車頭時間を有して走行すると考えられ、さらに車種ごとの車頭時間にはばらつきがあることが想定される。そのため、車種別の車頭時間分布を設定することによって、確率的な交通容量を表現した。このことにより、リンク上の自動運転車両の比率によって、異なる分布形状をとる確率的なリンク交通容量を表現することができた。経路選択の異質性と確率的交通容量の影響を表現したマルチユーザクラス均衡配分問題として、交通解析法の定式化を行った。この解析法では、交通量だけではなく移動時間も確率変数として計算されるため、時間信頼性の視点から、自動運転車両が道路ネットワークに与える影響の定量的評価が可能となった。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator, 21H01446

自然災害による路面状態の不確実性を考慮するネットワーク規模交通状態推定手法の開発
科学研究費助成事業研究活動スタート支援
Sep. 2021 - Mar. 2023
峪龍一
日本学術振興会, 研究活動スタート支援, 北海道大学, Principal investigator