Updated on 2024/03/28

写真a

 
ZHANG Xin
 
Organization
Graduate School of Environmental Studies Education and Research Center for Sustainable Co-Development Division Lecturer
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Engineering Architecture
Title
Lecturer
Contact information
メールアドレス

Degree 1

  1. Doctor of Engineering ( 2017.4   Nagoya University ) 

Research Interests 4

  1. User behavior

  2. Roundabout

  3. Pedestrian

  4. Signal phase

Research History 1

  1. Nagoya University

    2017.4

Education 1

  1. Nagoya University   Graduate School of Engineering

    2010.4 - 2012.3

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    Country: Japan

Professional Memberships 3

  1. JAPAN SOCIETY OF TRAFFIC ENGINEERS

    2012

  2. アジア交通学会   会員

    2011

  3. JAPAN SOCIETY OF CIVIL ENGINEERS

    2010.11

Awards 4

  1. 第39回交通工学研究発表会 研究奨励賞

    2022.8   交通工学研究会   道路利用特性指標を用いた道路ネットワークの階層化度の提案

    関原敏裕・柿元祐史・中村英樹・井料美帆・張馨

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  2. 土木計画学研究委員会優秀論文賞

    2018.11   公益社団法人土木学会土木計画学研究委員会   幾何構造要因を考慮したラウンドアバウト流入交通容量推定モデル

    神戸信人, 張馨, 中村英樹, 尾高慎二

  3. 第32回交通工学研究会論文賞

    2018.6   交通工学研究会   信号交差点における歩車分離の程度と交差点性能との関係に関する解析的研究

    張馨, 中村英樹

  4. 第32回交通工学研究発表会 研究奨励賞

    2012.9   交通工学研究会  

    浅野美帆・張 馨・Wael K.M.Alhajyaseen・中村 英樹

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    Award type:Award from Japanese society, conference, symposium, etc. 

 

Papers 34

  1. Left-Turn Lane Capacity Estimation based on the Vehicle Yielding Maneuver Model to Pedestrians at Signalized Intersections Reviewed

    Wang, Y., Zhang, X., Nakamura, H.

    Sustainability     2024.3

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/su16062313

  2. Analysis of factors affecting differences in off-peak travel speeds on arterial roads in Japan and abroad Reviewed

    INAMOTO Yuichi, ZHANG Xin, NAKAMURA Hideki

    Proceedings of the Conference of Japan Society of Traffic Engineers   Vol. 43 ( 0 ) page: 403 - 410   2023

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (other academic)   Publisher:Japan Society of Traffic Engineers  

    DOI: 10.14954/jsteproceeding.43.0_403

    CiNii Research

  3. A Method for Evaluating the Functional Hierarchy of Road Networks Reviewed

    Sekihara, T., Kakimoto, Y., Nakamura, H., Iryo-Asano, M. and Zhang, X.

    Proceeding of World Conference on Transport Research (WCTR)     2024.7

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  4. Left-turn Lane Capacity Estimation based on the Vehicle Yielding Maneuver Model to Pedestrians at Signalized Intersections Reviewed

    Wang, Y., Zhang, X. and Nakamura, H.

    Proceeding of World Conference on Transport Research (WCTR)     2023.7

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  5. 道路利用特性指標を用いた道路ネットワークの機能階層性の評価手法 Reviewed

    関原 敏裕, 柿元 祐史, 中村 英樹, 井料 美帆, 張 馨

    交通工学論文集   Vol. 9 ( 2 ) page: A_69 - A_78   2023.2

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    Authorship:Last author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.14954/jste.9.2_A_69

  6. A Method for Evaluating the Functional Hierarchy of Road Networks by using Road Use Characteristic Indices

    SEKIHARA Toshihiro, KAKIMOTO Yuji, NAKAMURA Hideki, IRYO Miho, ZHANG Xin

    JSTE Journal of Traffic Engineering   Vol. 9 ( 2 ) page: A_69 - A_78   2023.2

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    Language:Japanese   Publisher:Japan Society of Traffic Engineers  

    <p>The concept of a functional hierarchical road network is important as one of the solutions to the road traffic problems that still occur in Japan, where the road network has been steadily developed. This study aims to propose a method to evaluate in which degree of functional hierarchy the road network is being used. In a virtual road network with three levels of hierarchy, the shortest routes are searched under the free flow conditions, and the road use characteristic indices are calculated such as trip lengths and use rates of each hierarchical level. Based on the conditions of the road network represented by these index values, a method to evaluate its functional hierarchy in four degrees is proposed. As a case study, the degree of hierarchy was calculated for the road networks in southern Gifu and western Shizuoka. The results revealed that the current evaluations of the functional hierarchy in these areas were low, and that the mid-level roads are required for improving the current situation.</p>

    DOI: 10.14954/jste.9.2_a_69

    CiNii Research

  7. Influence of Vehicle Yielding Maneuver to Pedestrians on Capacity of Left-Turn Lane at Signalized Intersections

    WANG, Y., ZHANG, X. and NAKAMURA, H.

    Proceeding of Infrastructure Planning   Vol. 66   2022.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (conference, symposium, etc.)  

  8. 道路交通性能に関する国際比較のためのオンラインデータの活用

    稲本 雄一,高橋 健一,柿元 祐史,張 馨,中村 英樹

    土木計画学研究・講演集   ( 66 )   2022.11

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  9. 道路利用特性指標を用いた道路ネットワークの階層化度の提案 Reviewed

    関原敏裕・柿元祐史・中村英樹・井料美帆・張 馨

    交通工学研究発表会論文集   ( 42 ) page: 455 - 462   2022.8

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  10. A novel hierarchical cooperative merging control model of connected and automated vehicles featuring flexible merging positions in system optimization

    Tang Z., Zhu H., Zhang X., Iryo-Asano M., Nakamura H.

    Transportation Research Part C: Emerging Technologies   Vol. 138   2022.5

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    Publisher:Transportation Research Part C: Emerging Technologies  

    Merging sections on freeways are typical bottlenecks for traffic efficiency and safety. The connected and automated vehicles (CAV) technology has great capability in improving traffic performance of merging bottlenecks. Current approaches of system optimal cooperative merging control assume single fixed merging point (CMC-SMP) for on-ramp vehicles to reduce the complexity of their models. Non-fixed merging positions have the potential to further improve merging operations but may lead to the computational explosion. To solve this core contradiction, this study proposes a novel hierarchical system optimal cooperative merging control model considering flexible merging positions (CMC-FMP) to realize safe and efficient merging processes. The upper-level – the tactical planning model is formulated as a non-convex mixed integer quadratically constrained programming, aiming at minimal total travel time in the control zone. It optimizes not only the merging sequence but also vehicles’ critical states in merging processes, such as the state of on-ramp vehicles when they merge. The lower-level - the motion planning model generates feasible trajectories and the next step actions for every vehicle. A Monte Carlo Tree Search-based decomposition algorithm (MCTS-DA) is further designed to improve the computational efficiency of the tactical planning model. Meanwhile, solutions of MCTS-DA are proved to have good optimality compared to the direct solving method. A batch-based scheme is developed to realize real-time control. The results reveal that the average delays of CMC-FMP are remarkably lower than those of CMC-SMP. Especially in low on-ramp ratio scenarios, the difference in improvement can reach 64%. Furthermore, the sensitivity analysis indicates that large safe merging margins and short merging sections are disadvantageous for traffic efficiency for the merging flow controlled by CMC-FMP.

    DOI: 10.1016/j.trc.2022.103650

    Web of Science

    Scopus

  11. Examination of Teardrop Roundabout Geometric Design through a Field Experimental Study

    OKUSHIRO Hiroshi, YOSHIOKA Keisuke, ISHIGURO Yuuki, NAKANE Takeshi, MATSUOKA Toshiaki, SHUDO Takako, ZHANG Xin, NAKAMURA Hideki, ABE Yoshinori, KANBE Nobuto, SHIMOKAWA Sumio

    JSTE Journal of Traffic Engineering   Vol. 8 ( 4 ) page: B_18 - B_25   2022.4

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    Language:Japanese   Publisher:Japan Society of Traffic Engineers  

    DOI: 10.14954/jste.8.4_b_18

    CiNii Research

  12. 実証実験による瓢箪型ラウンドアバウト幾何構造の検討 Reviewed

    交通工学論文集   Vol. 8 ( 4 ) page: B_18 - B_25   2022.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  13. Efficiency and Safety Evaluation of Left-turn Vehicles and Crossing Pedestrians in Signalized Intersections under the Autonomous Vehicle Mixed Flow Condition

    Pan A., Zhang X., Iryo-Asano M., Nakamura H.

    International Journal of Intelligent Transportation Systems Research   Vol. 20 ( 1 ) page: 103 - 116   2022.4

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    Publisher:International Journal of Intelligent Transportation Systems Research  

    Field experiments of autonomous vehicles (AVs) have been conducted in many countries. However, efficiency evaluation of AV mixed flow and safety evaluation of conflicts between AVs and pedestrians in the real-world case are still limited. This study aims at evaluating the efficiency and safety of left-turn (LT) vehicles and pedestrians in signalized intersections, under the condition of AV mixed flow, by developing a simulation model. Post Encroachment Time (PET) and LT capacity were obtained. Further, gap/lag acceptance behavior and reaction time of LT vehicles were found to be critical parameters that affect efficiency and safety evaluations.

    DOI: 10.1007/s13177-021-00276-z

    Scopus

  14. A novel hierarchical cooperative merging control model of connected and automated vehicles featuring flexible merging positions in system optimization Reviewed

    Tang, Z., Zhu, H., Zhang, X., Iryo-Asano, M., Nakamura, H.

        2022.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.trc.2022.103650

  15. Analysis of Left-turn Lane Capacity under Autonomous Vehicle Mixed Flow Considering the Influence of Pedestrian Volume and Crosswalk Length Reviewed

    Zhang, X., Wang, Y., Nakamura, H. and Liu, K.

    Asian Transport Studies   ( 8 )   2022.3

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.eastsj.2022.100070

  16. Capacity Analysis of Signalized Traffic Circles in Comparison with Conventional Intersections

    BAI Yan, ZHANG Xin, NAKAMURA Hideki

    Journal of the Eastern Asia Society for Transportation Studies   Vol. 14 ( 0 ) page: 1958 - 1975   2022.3

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    Language:English   Publisher:Eastern Asia Society for Transportation Studies  

    <p>Full signalized traffic circles are operating in some countries to serve the heavy turning traffic flows at large-sized road junctions. Their capacities are influenced by many factors, such as the traffic conditions, signal control types and geometric layouts. The objective of this study is to find out the specified traffic demand conditions that signalized traffic circles are preferred in different cases of the number of lanes and lane configurations. A signal optimization model for the traffic circles is proposed for investigating five cases of signalized traffic circles under various traffic demand conditions. The results showed that signalized traffic circles have higher capacity than signalized intersections in some specific cases, e.g. when the total number of approach lanes reaches five or when more than one right-turn lanes are required. Besides, an analysis on the relationship between the capacity and the occupied area is conducted to further consider the geometric influence.</p>

    DOI: 10.11175/easts.14.1958

    CiNii Research

  17. ラウンドアバウト幾何構造要素と車両走行位置の関係分析 Invited Reviewed

    西垣 裕樹, 張 馨, 柿元 祐史, 中村 英樹

    交通工学論文集   Vol. 8 ( 2 ) page: A_15 - A_21   2022.2

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.14954/jste.8.2_A_15

  18. Analysis on the Relationship between Roundabout Geometric Elements and Vehicle Driving Positions

    NISHIGAKI Yuki, ZHANG Xin, KAKIMOTO Yuji, NAKAMURA Hideki

    JSTE Journal of Traffic Engineering   Vol. 8 ( 2 ) page: A_15 - A_21   2022.2

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    Language:Japanese   Publisher:Japan Society of Traffic Engineers  

    DOI: 10.14954/jste.8.2_a_15

    CiNii Research

  19. Analysis of left-turn lane capacity under autonomous vehicle mixed flow considering the influence of pedestrian volume and crosswalk length

    Zhang X., Wang Y., Nakamura H., Liu K.

    Asian Transport Studies   Vol. 8   2022.1

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    Publisher:Asian Transport Studies  

    Conflicts between pedestrians and left-turning vehicles cause pedestrian safety hazards and decrease vehicle turning capacity at signalized intersections. This commonly occurs in Japan where they share the same traffic light phase. Road capacity is influenced by the interaction between them. Autonomous vehicles (AVs) promise to improve the safety and efficiency of road networks. However, they will face the same problems as human-driven vehicles with pedestrian avoidance. Thus, this study estimated the capacity of the left-turn lane, in Japan, under AV mixed flows taking into account AV penetration rates, pedestrian flow rates, and crosswalk length. The impact of AVs on capacity was analyzed with different settings for the critical gap between vehicles and pedestrians. It was found that if AVs comply perfectly with traffic law, the capacity of the left-turn lane sharply decreases, especially in the case of long crosswalks.

    DOI: 10.1016/j.eastsj.2022.100070

    Scopus

  20. Proposal for the Degree of Hierarchy of Road Networks using Road Use Characteristic Index

    SEKIHARA Toshihiro, KAKIMOTO Yuji, NAKAMURA Hideki, IRYO Miho, ZHANG Xin

    Proceedings of the Conference of Japan Society of Traffic Engineers   Vol. 42 ( 0 ) page: 455 - 462   2022

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    Language:Japanese   Publisher:Japan Society of Traffic Engineers  

    DOI: 10.14954/jsteproceeding.42.0_455

    CiNii Research

  21. A novel agent-based framework for evaluating pedestrian safety at unsignalized mid-block crosswalks

    Zhu H., Almukdad A., Iryo-Asano M., Alhajyaseen W.K.M., Nakamura H., Zhang X.

    Accident Analysis and Prevention   Vol. 159   2021.9

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    Publisher:Accident Analysis and Prevention  

    A critical safety problem in road networks is the conflicts on unsignalized crosswalks. Thus, a proactive approach to assess pedestrian safety performance is required. Simulating the microscopic road user behavior in a virtual platform is one of the typical approaches. However, current simulation tools are not flexible enough to properly reproduce various behaviors of pedestrians and drivers considering their interactions with the road environment and other road users. Therefore, the objective of this paper is to propose a novel agent-based framework for evaluating pedestrian safety at unsignalized crosswalks. Unsignalized mid-block crosswalks with refuge islands (UMCR) are considered as an example facility to implement the proposed framework, where relevant behavioral elements such as the reaction time, visual field with obstacles, and minimum safety margin time are addressed. Not only the pedestrian-vehicle interaction is modeled but also the vehicle-vehicle interaction is considered. Empirical validation on a UMCR shows that the proposed framework can reproduce reliable distributions of the post encroachment time compared to the observed distributions within an acceptable error range. The sensitivity analysis reveals that the high reaction time of drivers, small safety margin time, and visual obstacles near crosswalks increase the probability of serious conflicts. The results also show that the framework can reproduce traffic crashes under assumed extreme road conditions.

    DOI: 10.1016/j.aap.2021.106288

    Web of Science

    Scopus

  22. A comparative study on the operational performance between signalized turbo roundabouts and signalized intersections

    Bai Y., Zhang X., Nakamura H.

    Asian Transport Studies   Vol. 7   2021.1

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    Publisher:Asian Transport Studies  

    Turbo roundabouts have been a popular choice of road intersections in the European countries in recent years, since they have better operational and safety performance than conventional roundabouts. To serve the heavy traffic demands, signal controls can be implemented on turbo roundabouts. The objective of this study is to clarify the specific traffic conditions, under which signalized turbo roundabouts are selected to install compared with signalized intersections. The twice-stop-right-turn control method is used for turbo roundabouts under the left-hand driving system. A signal control optimization model for turbo roundabouts is developed. Sensitivity analysis is made to capture the influence of entry volume and the right-turn movement ratio on capacity and average delay. Furthermore, the trend of the capacity of roundabouts with the radius of the central island is studied. It is found that under heavy balanced entry volumes, signalized turbo roundabouts have better operational performance than signalized intersections.

    DOI: 10.1016/j.eastsj.2021.100033

    Scopus

  23. ESTIMATION OF EXPECTED PEDESTRIAN PRESENCE-TIME AT THE CONFLICT-AREA OF SIGNALIZED CROSSWALKS

    EMAGNU Yonas M., ZHANG Xin, IRYO-ASANO Miho, NAKAMURA Hideki

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   Vol. 76 ( 5 ) page: I_1485 - I_1495   2021

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    Language:English   Publisher:Japan Society of Civil Engineers  

    <p>Crossing pedestrians is one of the critical factors in proper estimation of turning vehicle capacities at signalized intersections. Although individual pedestrian walking speeds and consequent pedestrian platoon maneuver are influenced by traffic signal settings, crosswalk length and bidirectional interactions of pedestrian flows, the existing capacity estimation methods of left-turning vehicles did not consider these impacts. This study aims to propose a method to estimate the expected pedestrian presence-time that pedestrian platoon occupies the conflict-area, considering the characteristics of pedestrian platoon maneuvers. Referring to the existing method to estimate time-dependent pedestrian presence probability distributions, this study re-estimated the parameters of the model using the additional database with higher pedestrian demand conditions. The model revealed that the increase of opposing pedestrian flow significantly reduces spatial variation. This model was applied to calculate expected pedestri</p>

    DOI: 10.2208/jscejipm.76.5_i_1485

    CiNii Research

  24. Investigating the Efficiency and Safety of Signalized Intersections Under Mixed Flow Conditions of Autonomous and Human-Driven Vehicles

    Pan Ang, Zhang Xin, Nakamura Hideki, Alhajyaseen Wael

    ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING   Vol. 45 ( 10 ) page: 8607 - 8618   2020.10

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    Publisher:Arabian Journal for Science and Engineering  

    DOI: 10.1007/s13369-020-04810-1

    Web of Science

    Scopus

  25. ESTIMATION OF ROUNDABOUT ENTRY CAPACITY AND PASSENGER CAR EQUIVALENT FOR HEAVY VEHICLES CONSIDERING THE IMPACT OF GEOMETRIC ELEMENTS

    FANG Yao, ZHANG Xin, NAKAMURA Hideki

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   Vol. 75 ( 5 ) page: I_1167 - I_1176   2019

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    Language:English   Publisher:Japan Society of Civil Engineers  

    <p>Entry capacity is one of the most important indexes to evaluate the roundabout operational performance. Both the geometric elements and vehicle types have an impact on the entry capacity. Passenger Car Equivalent (PCE) for heavy vehicles is utilized for roundabout entry capacity estimation. In the Japanese Roundabout Manual (JRM), PCE is proposed as a constant value. However, it cannot reflect that the capacity of roundabouts varies with different geometric elements and heavy vehicle percentages. Therefore, the objective of this study is to estimate the PCE for heavy vehicles depending on various geometric elements. Entry capacity and PCE were estimated by the entry capacity equation in JRM and traffic simulator VISSIM, respectively. The results revealed that the entry capacity changes with different geometric elements and is significantly related to inscribed circle diameter. It was also concluded that PCE changes with increasing heavy vehicle percentages in the entering and circulating flows.</p>

    DOI: 10.2208/jscejipm.75.i_1167

    CiNii Research

  26. A comparative study on the operational performance of four-leg intersections by control type Reviewed

    Arshi, AN; Alhajyaseen, WKM; Nakamura, H; Zhang, X

    TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE   Vol. 118   page: 52 - 67   2018.12

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    Publishing type:Research paper (international conference proceedings)   Publisher:Transportation Research Part A: Policy and Practice  

    The selection of proper control types at intersections at the planning stage is an important concern considering the difficulty in comparing the performance of different control types. Therefore, several manuals proposed selection charts to guide traffic engineers in identifying the control strategy that yields to the lowest delay and the highest level of service. However, most of these methodologies consider only total major and minor street traffic flows. They do not necessarily suggest to investigate the impact of turning traffic and pedestrian flows, which limits the applicability of their recommendations. Thus, this study aims to propose a procedure to assess the selection of the optimum control strategies among two-way stop, roundabout and signalization using average intersection vehicle delay as the evaluation criterion. The impact of turning traffic on the major and minor streets as well as the impact of pedestrians are integrated into the developed analytical methodology for the estimation of average intersection vehicle delay. A typical layout of isolated four-leg two-way intersection is assumed for the model development. It is concluded that turning traffic and pedestrians play essential roles in the performance of intersections. As pedestrian flow increases, signal control becomes prevailing over the other control types.

    DOI: 10.1016/j.tra.2018.08.039

    Web of Science

    Scopus

  27. 焼津駅南口前横断歩道における二段階横断方式社会実験 Invited

    中村英樹, 張馨, 小長谷雅彦, 松下勝則

    交通工学   Vol. 53 ( 4 ) page: 30 - 34   2018.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  28. A Comparative Study on the Operational Performance of Four-leg Intersections by Control Type Reviewed

    Arshi, A.N, Alhajyaseen, W.K.M, Nakamura, H, Zhang, X

      Vol. 118   page: 52 - 67   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)  

  29. An Analysis of Pedestrian and Vehicle Behavior on Unsignalized Mid-block Crosswalks Reviewed

    Wu, Y, Zhang, X, Nakamura, H

        page: 249 - 255   2018.8

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    Language:English   Publishing type:Research paper (other academic)  

  30. Modeling the Impacts of Heavy Vehicle and Geometry on Roundabout Entry Capacity Reviewed

    Zhao, Y, Zhang, X, Alhajyaseen, W, Nakamura, H

    97th Transportation Research Board Annual Meeting     2018.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  31. A ROUNDABOUT ENTRY CAPACITY ESTIMATION MODEL CONSIDERING THE IMPACT OF GEOMETRIC ELEMENTS

    KANBE Nobuto, ZHANG Xin, NAKAMURA Hideki, ODAKA Shinji

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)   Vol. 74 ( 5 ) page: I_1399 - I_1409   2018

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    Language:Japanese   Publisher:Japan Society of Civil Engineers  

    Entry capacity of roundabouts should be confirmed when considering their introduction. However, since there are still few roundabouts in Japan, the impact of roundabout geometry on entry capacity is still unclear. In addition, although the roundabout entry capacity in Japan is calculated based on the gap acceptance theory, the impact of roundabout geometry on the necessary gap parameters has not been clarified. Therefore, in this study the impact of roundabout geometry on entry capacity of roundabouts was analyzed using empirical data from Japan, and an estimation model of the gap parameters using geometry and traffic conditions as explanatory variables was proposed. Based on this, the influence of roundabout geometry on entry capacity was quantitatively clarified.

    DOI: 10.2208/jscejipm.74.i_1399

    CiNii Research

  32. Operational Performance Evaluation of Four-leg Intersection Control Types Reviewed

    Arshi, A. N, Nakamura, H, Zhang, X

      Vol. 37   page: 17 - 23   2017.8

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    Language:English   Publishing type:Research paper (other academic)  

    CiNii Books

  33. Analytical Study on the Relationship between Level of Pedestrian-vehicle Separation and Performance of Signalized Intersections Reviewed

    ZHANG Xin, NAKAMURA Hideki

    JSTE Journal of Traffic Engineering   Vol. 3 ( 5 ) page: 11 - 20   2017.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Traffic Engineers  

    One of the measures to inhibit conflicts between pedestrian and left-turning vehicle at crosswalk of signalized intersections is, to provide separate phases for pedestrian and turning vehicle, such as exclusive pedestrian phase or Leading Pedestrian Interval (LPI). LPI is the phase which pedestrian green is displayed a few seconds ahead of vehicle green phase, and in this preceding time interval, a part of pedestrians can be protected from the conflicting left-turning vehicles. From the viewpoint of safety and mobility performance, LPI can be positioned between the conventional four-phase type in which the concurrent pedestrians and vehicles share the same signal phase and the exclusive pedestrian phase type. However, the safety and mobility performance of these three types of signal phasing is unclear. Thus, this study investigates and compares delays of pedestrian and vehicle, degree of saturation, capacity and pedestrian exposure time under those three types of signal phase types. Then an application range of LPI and the boundary condition of exclusive pedestrian phase are discussed.

    DOI: 10.14954/jste.3.5_11

    CiNii Research

  34. A Methodology for Investigating Effective Range of Leading Pedestrian Interval Considering Safety and Operational Performance of Signalized Intersections in Japan Reviewed

    Zhang, X, Nakamura, H

        2017.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

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Presentations 12

  1. Analysis on Cooperative Yielding Maneuver of Circulating Vehicles to Entering Vehicles at Roundabouts

    WANG, Y., ZHANG, X. and NAKAMURA, H.

    2023.11 

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  2. 日本のラウンドアバウトデータベースの開発と導入実態の概観

    吉岡 慶祐・張 馨・中村 英樹

    土木計画学研究発表会  2023.11 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  3. 小型ラウンドアバウトの一般化にむけた基礎研究

    久坂 直樹・宮坂 好彦・阿部 義典・張 馨

    土木計画学研究発表会  2023.11 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  4. 拠点間移動の実態分析に基づく目標旅行時間検討手法の提案

    柿元 祐史・張 馨・内海 泰輔

    土木計画学研究発表会  2023.11 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  5. 道路交通のサービスの質と評価指標の構造に関する一考察-指標に関する研究レビューと概念整理を通して-

    井料 美帆・張 馨・吉岡 慶祐・青山 恵里・柿元 祐史

    土木計画学研究発表会  2023.11 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  6. 道路の交通容量に関する研究レビューと今後の展望

    泉 典宏・青山 恵里・石田 貴志・柿元 祐史・近田 博之・張 馨・吉岡 慶祐・野中 康弘・喜多 秀行

    土木計画学研究発表会  2023.11 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  7. 東浦自然環境学習の森における持続可能な活動のための竹林 管理に向けて

    佐藤則子、勝浦柊、紀平真理子、張馨、川口陽子、宮坂隆文、加藤博和、平野恭弘、山下博美

    環境共生学会  2023.9.17 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  8. Influence of Vehicle Yielding Maneuver to Pedestrians on Capacity of Left-Turn Lane at Signalized Intersections

    2022.11 

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    Event date: 2022.11

    Language:English   Presentation type:Oral presentation (general)  

  9. 道路交通性能に関する国際比較のためのオンラインデータの活用

    土木計画学研究発表会  2022.11 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  10. 道路構造・交通運用に起因する道路交通性能に関する国際比較分析

    土木計画学研究発表会  2022.11 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  11. 国内ラウンドアバウト導入状況の経過と 立地特性分析

    土木計画学研究発表会  2022.11 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  12. 道路利用特性指標を用いた道路ネットワークの階層化度の提案

    交通工学研究発表会  2022.8 

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    Event date: 2022.8

    Language:Japanese   Presentation type:Oral presentation (general)  

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Research Project for Joint Research, Competitive Funding, etc. 1

  1. ESRA3プロジェクトに関連した各国の交通社会、交通文化の違いに関する分析支援

    2023.10 - 2025.3

    学術コンサルティング

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    Grant type:Other

KAKENHI (Grants-in-Aid for Scientific Research) 2

  1. 左折車の法令遵守率向上と円滑性の両立に寄与する信号交差点制御手法に関する研究

    Grant number:22K14335  2022.4 - 2024.3

    科学研究費助成事業  若手研究

    張 馨

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2340000 ( Direct Cost: \1800000 、 Indirect Cost:\540000 )

    日本の道路交通法では、交差点での左折車と横断歩行者の軌跡が交錯する場合、左折車は停止して歩行者に進路を譲ることが定められている。しかしながら、車両が歩行者の前を通過する場面も多々存在する。一方海外では、二段階横断方式などを導入することで一回の横断距離を短くし、左折車による遵守率向上と円滑性の損失を小さくする事例もある。このように、法令遵守率は、単にマナーの問題だけにとどまらないと考えられる。そこで本研究では、信号付き横断歩道における左折車の法令遵守状況をさまざまな道路構造条件や交通条件下における実態分析し、左折車の法令遵守率の向上と円滑性の両立に寄与する横断歩道構造及び交通制御方式を提案する。
    日本の道路交通法では、車両は横断歩道を通行する際、接近する歩行者に進路を譲ることが定められている。しかしながら、車両が歩行者の前を通過する場面も多々存在する。一方海外では、二段階横断方式などを導入することで一回の横断距離を短くし、左折車による遵守率向上と円滑性の損失を小さくする事例もある。このように、法令遵守率は、単にマナーの問題だけにとどまらないと考えられる。そこで本研究では、歩行者交通量、横断歩道の幾何構造、信号現示を考慮した車両の歩行者に対する譲り挙動特性を明らかにした。6つの横断歩道の観測データを用いて、左折車が歩行者優先ルールへの遵守状況を分析し、歩行者交通量、信号現示、横断歩道の幾何構造、との関係を把握したうえで、左折車両の譲り挙動モデルを構築した。その結果、横断歩行者数と横断歩道長は左折車両の譲り率に正の影響を与え、歩行者青時間の経過時間は負の影響を与えることが示された。長い横断歩道においては、法令遵守率が上がると左折車両が通過できる台数が激減する可能性が高い。また、歩行者青時間の終盤に左折車両と横断歩行者の両者が早く通過・横断し終えたいため、交錯の危険性も高くなる。以上により、現在の左折車両の法令遵守状況と信号交差点を計画段階に想定している状況は必ずしも一致していないことが明らかになった。今後本年度に構築した左折車両の譲り挙動モデルが左折車両の円滑性と歩行者の安全性の評価や信号交差点の設計および信号制御の設定の検討には不可欠である。
    今年度の研究実施計画は左折車が歩行者優先ルールへの遵守状況を分析し、信号現示、横断歩道の幾何構造および歩行者交通量との関係を把握し、その遵守挙動を再現可能な車両譲り挙動モデルを構築することである。データ分析およびモデルの構築は計画通りに進んでおり、その研究成果を国内学会と海外学会へ投稿した。さらに、今後学会で得られたコメントが反映された内容で、ジャーナルに投稿する予定である。そのため、本年度の研究は順調に予定通り進めていると判断した。
    前年度に構築した左折車両の譲り挙動モデルに基づくモンテカルロシミュレーションを実施し、遵守状況に応じて左折車線の交通容量の相違点を明らかにし、その変化に対応できる現行の交通容量推定手法の改善を提案する。また、ケーススタディを通じて、交差点の幾何構造や信号現示が遵守状況と左折車線の交通容量に与える影響を明らかにする。さらに、自動運転車の様々な設定概念に合わせて、歩行者の安全性と自動車の円滑性の双方を考慮して二段階横断方式も含めた合理的な横断歩道の構造や信号制御方式の選定方法を提示し、全体を取りまとめる。

  2. A study on traffic signal phasing schemes considering crossing pedestrian maneuvers at signalized intersections

    Grant number:19K15111  2019.4 - 2022.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Xin Zhang

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    Authorship:Principal investigator 

    Grant amount:\3640000 ( Direct Cost: \2800000 、 Indirect Cost:\840000 )

    This study proposed an estimation method of pedestrian presence probability by empirical observation of different signalized crosswalks that can appropriately reflect the Japanese situations considering the bi-directional crossing pedestrians, signal phasing scheme and crosswalk geometry. Based on this method, a safety index of pedestrian exposure time and left-turn lane capacity estimation method were developed for quantitatively evaluating pedestrian safety and the efficiency of left-turn lanes. The results of this study can be applied for planning and operational stage analysis of signalized crosswalks and the selection of traffic signal phasing schemes regarding the treatment of pedestrian and left-turn vehicle volumes and crosswalk geometry.

 

Teaching Experience (On-campus) 5

  1. 臨床環境学研修1

    2023

  2. Classes and Research Instruction in Basic Environmental Studies I

    2022

  3. On-site Research Training in Clinical Environmental Studies I

    2022

  4. Seminar on Urban Space and Environment 4A

    2022

  5. Seminar on Urban Space and Environment 4B

    2022