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2000 Fiscal Year Final Research Report Summary

Study on the Relations between Drivers' Behavior and Road Alignments and Visual Environment at Sag Sections on Expressways.

Research Project

Project/Area Number 11450194
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field 交通工学・国土計画
Research InstitutionOsaka University

Principal Investigator

MORI Yasuo  The Graduate School of Engineering, Osaka University, Professor, 工学研究科, 教授 (60230083)

Co-Investigator(Kenkyū-buntansha) OGUCHI Takahasi  The Graduate School of Engineering, Tokyo Metropolitan University, Associate Professor, 大学院・工学研究科, 助教授 (90281245)
KIMURA Kazuhiro  Faculty of Engineering and Resource Science, Akita University, Associate Professor, 工学資源学部, 助教授 (60177912)
YAMADA Minoru  Faculty of Engineering, Ibaragi University, Associate Professor, 工学部, 助教授 (50182556)
IIDA Katsuhiro  The Graduate School of Engineering, Osaka University, Assistant Professor, 工学研究科, 講師 (70222809)
Project Period (FY) 1999 – 2000
KeywordsExpressways / Sag Sections / Indoor Experiment / Driving Simulator / Bottlenecks / Visual Environment / Eye Movement
Research Abstract

In this study, we concern the relations between drivers' behavior and road alignments and visual environment at sag sections on expressways. The major point of this study are as following :
(1) Important results of chapter-2 are as follows. 1) It was quantitatively clarified that three factors influenced characteristics of the acceleration between the starting at signalized intersection and the stable following driving. Factors analyzed here, are the attributes of drivers, time headway at the signalized intersection the vehicle started, and the stable speed of leading vehicle. It was also clarified that the effect of drivers' age is significant. 2) The effect of the drivers' attributes had common effects to different road sections. It was confirmed that acceleration of aged drivers is lower than the others at flat or incline section, and is more than the others at decline section. These observations were confirmed at simple incline and decline section as well as sag section. 3) At sag s … More ection, driving pattern that relatively big deceleration was generated in sag bottom and upgrade interval because the headway became small at decline section. The relationship between such deceleration pattern and acceleration of flat area was not observed. This means that even aged drivers with gentle accelerating at flat area may have risk of such sudden decelerating.
(2) The data of drivers' behavior at sag section were collected with driving simulator. And in order to make clear the decision-making process of drivers' behavior, the present study used "protocol analysis". The main result of protocol analysis is that the grounds to exclude the data were obtained and it was found out that rousing drivers to recognize the change of inclination is important. Analysis results of the data of drivers' behavior revealed the effectiveness of the alternative proposed for improvement of radius of vertical curves and frontal visibility
(3) The repetition experiment by one subject using the Simulator produces platoon traffic stream made of only one particular driving behavior parameter. Those streams are produced for ten subjects, and it is found that such uniform stream still form a kind of shock wave phenomena. On the other hand, another type of experiment, which produces platoon traffic streams made by several subject on seven types of road vertical alignment, is carried out. The condition of vertical alignments is different in algebraic difference of upstream and down stream grade at a sag section ('algebraic grade difference') and in 'vertical curve length'. The experiment shows that not most steep grade change of sag sections produces deceleration shock wave and also most gentle grade change does it. Some particular characteristics of a subject of traffic stream might cause deceleration shock wave. Less

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 飯田克弘,池田武司,河井健,森康男,山岸将人: "プロトコル法を用いた運転者挙動分析結果に基づくサグ部の道路構造改善方針の検討"土木計画学研究・講演集. No.23(2). 813-816 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河井健,飯田克弘,森康男,山岸将人,野口雅弘: "室内実験によるサグ部の運転者挙動分析結果に基づく道路構造改善方針の検討"土木学会第55回年次学術講演会講演概要集. 第4部. 26-27 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Oguchi: "Needs for Developping New Car-following Model for Evaluation Cruise-Assist Highway Systems"Proc.of 7th WC on Its(Torino). (on CD-ROM). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大口敬: "高速道路単路部渋滞発生解析-追従挙動モデルの整理と今後の展望-"土木学会論文集. No.660/IV-49. 39-51 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山田稔,荒井重喜: "運転者属性を考慮したサグ区間における運転者の追従特性に関する研究"土木計画学研究・講演集. No.23(2). 805-808 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村一裕,清水浩志郎,相原良孝: "CG映像を用いたトンネル内の視線誘導方策に関する研究"交通工学研究発表会論文集. 20号. 25-28 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 相原良孝,木村一裕,溝端光雄,高宮進,前川佳史,清水浩志郎: "道路案内標識通過時における高齢ドライバーの運転特性ならびに判断能力"土木計画学研究・講演集. No.23(2). 895-898 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Katsuhiro IIDA, Takashi MIKI, Yasuo MORI, Takashi OGUCHI and Koichi MATSUMOTO: "Analyses of Drivers' Behavior during Sag Sections Based on the Results of Actual Driving Experiment and Indoor Driving experiment"Proceedings of the Infrasturcture Planning. 22(2). 967-970 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Katsuhiro IIDA, Takeshi IKEDA, Ken KAWAI, Yasuo MORI and Masato YAMAGISHI: "Study on the Road Structure Improvement of Sags Based on the Results of Analysis of the Drivers' Behavior using the Protocol Analysis."Proceedings of the Infrasturcture Planning. 23(2). 813-816 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takashi Oguchi: "Needs for Developping New Car-following Model for Evaluating Cruise-Assist Highway Systems."Proceedings of the 7th World Conference on ITS. (CD-ROM). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takashi Oguchi: "Analysis of Bottleneck Phenomina at Basic Freeway Segments"Journal of Infrastructure Planning and Management. No.660/IV-49. 39-51 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Minoru YAMADA and Shigeki ARAI: "Following Behavior at Sag Section Considering Drivers' Attribute"Proceedings of the Infrastructure Planning. 23(2). 805-808 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuhiro KIMURA, Mitsuo MIZOHATA, Yuko Minowa, Koshiro SHIMIZU: "Gap Acceptance Characteristics at Intesections of Elderly Drivers"Proceedings of Japan Society of Traffic Engineers. Vol.19. 89-92 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshitaka AIHARA, Kazuhiro KIMURA, Mitsuo MIZOHARA, Susumu TAKAMIYA and Koshiro SHIMIZU: "Driving Characteristics and Judgment Ability of Elderly Drivers to Traffic Guide Signs."Proceedings of the Infrastructure Planning. 23(2). 895-898 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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