Faculty Profiles - IRYO Miho

Papers - IRYO Miho

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A Study on the Impact of AV-HDV Mixed Traffic on Flow Dynamics of Single-Lane Motorway

Kakimoto Yuji, Iryo-Asano Miho, Orhan Emre, Nakamura Hideki

INTERNATIONAL SYMPOSIUM OF TRANSPORT SIMULATION (ISTS'18) AND THE INTERNATIONAL WORKSHOP ON TRAFFIC DATA COLLECTION AND ITS STANDARDIZATION (IWTDCS'18) - EMERGING TRANSPORT TECHNOLOGIES FOR NEXT GENERATION MOBILITY Vol. 34 page： 219 - 226 2018

平安京の交通流に関する一考察 Reviewed

桑原雅夫, 井料美帆

土木学会論文集D3 Vol. 73 ( 5 ) page： I_493-I_505 2017.12

Human-like motion planning model for driving in signalized intersections Reviewed

Yanlei Gu, Yoriyoshi Hashimoto, Li-Ta Hsu, Miho Iryo-Asano, Shunsuke Kamijo

IATSS Research Vol. 41 ( 3 ) page： 129 - 139 2017.10

Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier B.V.

Highly automated and fully autonomous vehicles are much more likely to be accepted if they react in the same way as human drivers do, especially in a hybrid traffic situation, which allows autonomous vehicles and human-driven vehicles to share the same road. This paper proposes a human-like motion planning model to represent how human drivers assess environments and operate vehicles in signalized intersections. The developed model consists of a pedestrian intention detection model, gap detection model, and vehicle control model. These three submodels are individually responsible for situation assessment, decision making, and action, and also depend on each other in the process of motion planning. In addition, these submodels are constructed and learned on the basis of human drivers' data collected from real traffic environments. To verify the effectiveness of the proposed motion planning model, we compared the proposed model with actual human driver and pedestrian data. The experimental results showed that our proposed model and actual human driver behaviors are highly similar with respect to gap acceptance in intersections.

DOI： 10.1016/j.iatssr.2016.11.002

Scopus

Studying critical pedestrian behavioral changes for the safety assessment at signalized crosswalks Reviewed

Wael K. M. Alhajyaseen, Miho Iryo-Asano

SAFETY SCIENCE Vol. 91 page： 351 - 360 2017.1

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Pedestrian-vehicle conflicts are one of the most important safety concerns at signalized intersections especially in urban areas. Conflicting vehicles and pedestrians select their maneuvers by predicting the other user behavior. Sudden behavioral changes of pedestrians such as sudden speed change (acceleration or deceleration) cannot be predicted by drivers, which can lead to safety hazards especially if these sudden behavioral changes occur near conflict areas. In this study, continuous pedestrian speed profiles were analyzed at signalized crosswalks to investigate the existence of such behavioral changes. A methodology is proposed to identify significant sudden changes of pedestrian speeds. The locations and timings of these sudden speed change events were analyzed, and the influencing factors such as crosswalk geometry and signal timing were studies and evaluated. Five signalized crosswalks at three intersections in Nagoya City were videotaped for analysis. Individual pedestrian maneuvers were extracted with image processing software. Empirical analysis showed that sudden acceleration events were observed at the entrance points to the pedestrian-vehicle conflict area, which highlights the significance of these events to pedestrian-vehicle conflict analysis. A multinomial logit model was developed to estimate the probability of a pedestrian making a sudden speed change as a function of different influencing factors. The results implied that the entering speed, necessary speed to finish crossing before the onset of the pedestrian signal red phase, and crosswalk length have a significant impact on speed change choices. This paper presents important suggestions to understanding pedestrian maneuvers in detail from the viewpoint of safety. (C) 2016 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.ssci.2016.09.002

Web of Science

Modeling pedestrian crossing speed profiles considering speed change behavior for the safety assessment of signalized intersections Reviewed

Iryo-Asano, M. and Alhajyaseen, W.K.M.

Accident Analysis & Prevention Vol. 108 page： 332-342 2017

交通流の変分原理に基づく系統信号路線の期待遅れ評価法 Reviewed

和田健太郎, 臼井健人, 大口敬, 井料(浅野)美帆

土木学会論文集D3 Vol. 73 ( 1 ) page： 85-96 2017

道路空間デザインが歩車間コミュニケーションに及ぼす影響に関する研究 Reviewed

中山昂彦, 宮川愛由, 谷口綾子, 井料美帆, 小嶋文, 藤井聡

交通工学論文集 Vol. 3 ( 4 ) page： A_84-A_91 2017

Evaluation of Safe Avoidance Distance for Pedestrians in Personal Mobility Vehicles and Pedestrian Mixed Traffic: A Simulation Based Study Reviewed

C. Dias, M. Iryo-Asano, H. Nishiuchi

Journal of the Eastern Asia Society for Transportation Studies Vol. 12 page： 1994-2005 2017

A probabilistic model of pedestrian crossing behavior at signalized intersections for connected vehicles Reviewed

Hashimoto Yoriyoshi, Gu Yanlei, Hsu Li-Ta, Iryo-Asano Miho, Kamijo Shunsuke

TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES Vol. 71 page： 164-181 2016.10

Experimental Analysis of Personal Mobility Maneuver Reacting to Pedestrians and Cyclists (特集持続可能な都市システムの構築を目指して)

井料美帆, DIAS Charitha, 加藤弘則, 霜野慧亮, 中野公彦

生産研究 Vol. 68 ( 4 ) page： 281-284 2016.7

高速道路単路部ボトルネックにおける追従挙動特性の車両個体差の実証分析

楊燕, 和田健太郎, 大口敬, 井料（浅野）美帆, 牧野浩志

生産研究 Vol. 68 ( 2 ) page： 139-143 2016

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

高速道路サグ部など単路部ボトルネックにおける交通渋滞発生時交通量は必ずしも一定ではなく，確率的に変動する事象として把握されている．この変動は個々の車両の運転挙動に違いがあることが主要因だと考えられている．東名高速道路下り大和バス停付近サグ部を対象に，複数ビデオカメラを画像処理することによって多数の運転挙動データを収集し，追従挙動モデルとそのパラメータ同定手法を精査して各走行データに適用した．得られた特性より，車両個体差の特徴を分析した．

A Simple expected delay estimation method of signalized arterial roads

USUI Kento, WADA Kentaro, OGUCHI Takashi, IRYO-ASANO Miho

SEISAN KENKYU Vol. 68 ( 2 ) page： 151-156 2016

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

This paper proposes an approximation method of expected delay for signalized arterial roads. This method is based on variational theory of traffic flow （VT）. In VT under stochastic demands, traffic flow dynamics is described as the solution of the stochastic shortest path problem. However, it is difficult to solve exactly. We, thus, propose the approximation method using the following two procedures: （i） solution space reduction based on the characteristics of the shortest path; （ii） Clark approximation. As a result of the experimental comparison with a Monte Carlo simulation, the error of the proposed method is extremely small.

タンデムソーティング戦略による信号交差点の容量増強のケーススタディ

ガスパイサンディメイ, 大口敬, 和田健太郎, 井料（浅野）美帆

生産研究 Vol. 68 ( 2 ) page： 145-150 2016

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

交差点におけるタンデムソーティング戦略 (TSS) は，右折・左折専用現示のある交差点における容量増強のアプローチである．この戦略では，ある現示の車両のみ交差点に到達できるよう上流部の信号で制御を行うため，それらの車両をより多くの車線を利用して効率的に捌くことができる．ただし，現示間の需要の偏りが大きい場合など，上流信号におけるスプリットがある一定値を越えると，交差点の捌け量が低下する．本研究では，こうした状況におけるケーススタディを行う．その結果，(1) 捌け量の低下が生じている場合でもなおTSS がない場合に比べてTSS 導入時の容量が高い，(2) TSS 導入時のサイクル長を短くすることにより，容量の増加と信号遅れの削減が同時に達成できることがわかった．

歩行者・自転車に反応するパーソナルモビリティ挙動の実験的分析

井料美帆, ディアスチャリタ, 加藤弘則, 霜野慧亮, 中野公彦

生産研究 Vol. 68 ( 4 ) page： 281-284 2016

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

<p>パーソナルモビリティは，特に短距離トリップに有効な新たな交通手段として注目されている．歩行者・自転車等の低速交通需要の多いアジア諸国においてパーソナルモビリティが実道展開するためには，他の交通手段との相互作用を適切に理解する必要がある．相互作用を表現するパーソナルモビリティの挙動モデルは，歩行者・車両挙動との類似点・相違点を理解したうえで，既存の歩行者・車両モデル等を改良することで構築可能と考えられる．本速報では，挙動モデルで用いられる説明変数の特性について，被験者実験による分析結果を報告する．</p>

AN EFFECT OF PEDESTRIAN'S COMMUNICATION TOWARD DRIVER ON PROMOTION OF DRIVER'S COOPERATIVE BEHAVIOR TO GIVE A WAY FOR PEDESTRIAN Reviewed

TANIGUCHI Ayako, TABE Taichi, IRYO Miho, MIYAKAWA Ayu, KOJIMA Aya

Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) Vol. 72 ( 5 ) page： I_1241-I_1247 2016

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

This research explores communication between pedestrian and vehicles on road space. This specific research was conducted and analysed based on a series of experiments. As a result, it became evident that active communication from walkers to drivers is highly effective. More importantly, raising hands are more effective than eye contact and bowing for drivers to increase their attention to walkers. This research has also found that cooperative behavior between walkers and drivers are deeply influenced by the speed of automobiles and the act of raising hands. In other words, the faster automobile is, the less we witness cooperative behavior between the two actors. It empirically shows that increasing communication between walkers and drivers will be a valid way to decrease the number of car accidents in the near future.

Study on Effects of Road Space Design on Communication between Pedestrian and Driver Reviewed

Vol. 36 page： 163-169 2016

Analysis and Modeling of Pedestrian Crossing Behavior During the Pedestrian Flashing Green Interval Reviewed

Iryo-Asano Miho, Alhajyaseen Wael K. M., Nakamura Hideki

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS Vol. 16 ( 2 ) page： 958-969 2015.4

TRAFFIC SIMULATION MODEL FOR ACCESS ROADS TO TRANSFER STATIONS CONSIDERING STOP POSITION CHOICE OF KISS-AND-RIDE VEHICLES Reviewed

IRYO-ASANO Miho

INFRASTRUCTURE PLANNING REVIEW Vol. 71 ( 5 ) page： I_931-I_941 2015

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

Access roads of transfer points, such as railway stations, can be a bottleneck due to conflicts between different road users coming to the transfer stations. Congestions from the bottleneck may propagate to other arterial roads. Kiss-and-ride vehicles, as one of the user types, are able to choose their stop positions freely on the access road, while their characteristics and how they affect on congestions are unknown. The purpose of this research is to clarify the relationship between stop position choice behavior of picking- up or dropping-off vehicles and queueing patterns at the access road, and to build a simulation model which quantitatively represents the queueing phenomena. From the survey data analysis, it was found that distribution of stopping duration varies by time of the day and the double parking of vehicles with relatively shorter stopping duration causes queue occurrence. The proposed simulation with stopping position choice including double-parking maneuver was able to represent various queueing patterns at the access road.

Performance Evaluation of Pedestrian Crossing Flow

IRYO Miho, NAGASHIMA Ai

SEISAN KENKYU Vol. 67 ( 4 ) page： 369-373 2015

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

This research aims to propose indices to evaluate the quality of services （QOS） of pedestrian crossing flow under both congested and uncongested conditions. Walking costs in crossing flows, which are not properly validated by conventional fundamental diagrams, are described by walking stability indices. The empirical data analysis revealed that the angle between directions of two pedestrian crossing flows has significant impact on QOS. A microscopic pedestrian behavior model, which represents the above characteristics, is proposed to evaluate QOS under different traffic demands and crossing angles.

プローブデータを活用した交差点の方向別交通量・旅行時間推定

ガスパイサンディメイ, 大口敬, 井料（浅野）美帆, 和田健太郎

生産研究 Vol. 67 ( 2 ) page： 125-130 2015

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

多くの交差点における車両感知器の課題は，左折・直進・右折の方向別の需要を直接把握することができない点である．これは，特に，右折専用現示を持つ信号の性能に影響するものであり，右折車両は相対的に短いスプリットにより，大きな遅れ時間を被る状況がしばしば発生する．本研究は，感知器データと光ビーコンによるプローブデータを組み合せることにより，右折需要とその旅行時間を推定する手法を開発する．推定手法を実際の交通データにより検証し，その推定結果に基づくスプリット調整による交差点の円滑性改善可能性について示す．

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Papers - IRYO Miho