Faculty Profiles - NAKAMURA, Hideki

Papers - NAKAMURA, Hideki

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Estimating the Minimum Required Width of Signalized Crosswalks Considering Bi-directional Pedestrian Flow and Different Age Groups

ALHAJYASEEN WAEL K. M., NAKAMURA HIDEKI

Proceedings of the Eastern Asia Society for Transportation Studies Vol. 2009 ( 0 ) page： 222 - 222 2009

Language：English Publisher：Eastern Asia Society for Transportation Studies

Existing manuals do not provide clear specifications for the required crosswalk width under different pedestrian demands and properties. However, optimizing crosswalk configurations including width is an important concern to improve the overall performance of signalized intersections. The objective of this paper is to develop a methodology for estimating minimum required crosswalk width at different pedestrian demands considering bi-directional flow and different pedestrian age groups. The developed methodology is based on modeling total pedestrian platoon crossing time which consists of discharge and crossing times. Discharge and crossing times are modeled by using shockwave and aerodynamic drag theories respectively. Then developed models are calibrated for crosswalks with elderly or pupil pedestrian platoons. A criteria based on pedestrian crossing speed is developed to identify the minimum required crosswalk width. Finally, different minimum required crosswalk widths are proposed.

DOI： 10.11175/eastpro.2009.0.222.0

CiNii Research

Signalized intersection design and operations: Experiences in Germany and Japan

Tang K., Nakamura H.

Proceedings of the 7th International Conference of Chinese Transportation Professionals Congress 2007: Plan, Build, and Manage Transportation Infrastructures in China page： 520 - 529 2008.12

Publisher：Proceedings of the 7th International Conference of Chinese Transportation Professionals Congress 2007: Plan, Build, and Manage Transportation Infrastructures in China

An official nationwide manual on intersection planning and design remains absent in China. Presently, a research group led by Tongji University is addressing its first version. Toward gaining more profound knowledge on state of the art in intersection design and operations in overseas while developing Chinese manual, this paper thus presents German and Japanese experiences. Conclusions, future studies and efforts essential for China are discussed finally. © 2008 ASCE.

DOI： 10.1061/40952(317)51

Scopus

IMPACTS OF GROUP-BASED SIGNAL CONTROL POLICY ON DRIVER BEHAVIOR AND INTERSECTION SAFETY

TANG Keshuang, NAKAMURA Hideki

Vol. 32 ( 2 ) page： 81 - 94 2008.11

Assessment of the Impacts of Opening the Hard Shoulder to Traffic on Travel Time Reliability

Mehran, B. and Nakamura, H.

Vol. No.38 page： 4ページ，CD-ROM 2008.11

A Proposed Methodology for Modeling Pedestrian Crossing Time at Signalized Crosswalks Considering Bi-directional Flow

Alhajyaseen, W. and Nakamura,H.

Vol. No.38 page： 4ページ，CD-ROM 2008.11

実務者のための交通流調査講座，第5回　道路交通管理のための交通流調査 Reviewed

鈴木一史・中村英樹

交通工学 Vol. Vol.43, No.6 page： 82-89 2008.11

Impacts of Group-based Signal Control Policy on Driver Behavior and Intersection Safety Reviewed

Tang, K. and Nakamura,H.

IATSS Research Vol. Vol.32, No.2 page： 81-94 2008.11

遅れと環境負荷に基づく交通量の少ない平面交差部の最適制御方式の検討

吉岡慶祐・中村英樹・馬渕太樹

第28回交通工学研究発表会論文集 page： 37-40 2008.10

幹線街路における走行性能照査型道路計画設計手法の構築

内海泰輔・中村英樹・中井麻衣子・小出貴文

第28回交通工学研究発表会論文集 page： 185-188 2008.10

*時間交通需要変動特性を考慮した交通性能照査型道路計画設計法 Reviewed

内海泰輔・中村英樹

土木計画学研究・論文集 Vol. Vol.25 page： 67-76 2008.9

交差点安全性評価を目的とした2D ナノシミュレーションにおける利用者挙動の表現

鈴木一史・中村英樹

土木計画学研究・講演集 Vol. No.37 page： 4ページ，CD-ROM 2008.6

Applying Travel Time Reliability for Pre-Evaluation of Expressway Congestion Improvement Schemes

Mehran, B. and Nakamura, H

Vol. No.37 page： 4ページ，CD-ROM 2008.6

Operational Performance of Group-Based Signal Control Policy Under Various Traffic Conditions

Tang, K. and Nakamura, H

10th International Conference on Application of Advanced Technologies in Transportation Vol. CD-ROM page： Athens 2008.5

Two-Lane Highway Desired Speed Distributions under Various Conditions, 87th TRB Annual Meeting

Catbagan, J.L. and Nakamura, H.

Transportation Research Board page： 10 pages, CD-ROM 2008.1

Characteristics of Breakdown Phenomenon in Merging Sections of Urban Expressways in Japan, Transportation Research Record

Shawky, M. and Nakamura, H

Transportation Research Board Vol. No. 2012 page： 11-19 2008.1

Traffic Management in Japan, Thema Forschung

Nakamura, H

Das Wissenschaftsmagazin der Technischen Universitat Darmstadt page： 62-64 2008

Transport policy and organization in Japan

Enoch, M; Nakamura, H

TRANSPORT REVIEWS Vol. 28 ( 2 ) page： 159 - 180 2008

Language：Japanese Publisher：Transport Reviews

In transport terms, Japan has an enviable reputation for operating effectively an incredibly complex road and rail system. However, relatively little is known about how this is done or about the issues that are facing policy-makers and shapers in the country. The purpose of this paper, then, is to investigate how land passenger transport is organized in Japan, and to begin to evaluate its effectiveness. This is done by drawing on a literature review and on findings from a scoping study based on a series of semi-structured in-depth interviews with key practitioners. Overall, the findings suggest that national and local transport policy in Japan faces a number of key challenges across all modes in the land passenger transport system, in particular relating to the fragmented approach to policy development, implementation, and operation and to the growing role of the car.

DOI： 10.1080/01441640701526699

Web of Science

Scopus

Desired Speed Distributions on Two-Lane Highways Under Various Conditions

Catbagan, JL; Nakamura, H

TRANSPORTATION RESEARCH RECORD ( 2088 ) page： 218 - 226 2008

Language：Japanese Publisher：Transportation Research Record

On a two-lane highway with passing restrictions, user dissatisfaction usually is caused by the inability to drive at the desired speed because of a relatively slower lead vehicle. Although this condition clearly shows that vehicles in this state are following, current definitions of "following vehicle" are based mainly on headway alone. A "follower" can be more logically defined as a vehicle traveling below its desired speed because of the presence of a relatively slower lead vehicle. The problem arises because the desired speeds of different drivers vary significantly; the variation makes it difficult to assess whether a vehicle is constrained on the basis of directly accessible data alone. A study was done to develop desired speed distributions for various traffic, weather, and ambient conditions, which can be later used as input for simulation or to calculate a vehicle's following probability given its current speed. The collected data were classified according to different traffic, geometric, weather, and ambient conditions to form 64 data sets for analysis. The desired speed distributions were estimated by using the modified Kaplan-Meier approach and were found to be suitable for use as either simulation input or as a tool that can be used for follower identification. Differences between holiday and weekday travel speed preferences and effects of weather on driver speed choices were also found.

DOI： 10.3141/2088-23

Web of Science

Scopus

A Methodology of a Traffic-Performance-Oriented Highway Planning and Design Considering Hourly Traffic Demand fluctuation

UTSUMI Taisuke, NAKAMURA Hideki

INFRASTRUCTURE PLANNING REVIEW Vol. 25 ( 25 ) page： 67 - 76 2008

Publisher：Japan Society of Civil Engineers

The existing highways in Japan are planned and designed based on the specifications determined in the past. However, economy and improvement of traffic-performance quality are demanded in the highways recently, and the authors have been advocating traffic-performance-oriented highway planning and design. In this paper, a methodology to estimate the traffic-performance of a planned inter-city highway throughout a year was established, and a traffic-performance-oriented highway planning and design methodology was proposed. This methodology provides several options of road crosssectional design for a planned highway, and makes it possible to adopt the most economical and best performing road structure and traffic operation option based on the latest knowledge

DOI： 10.2208/journalip.25.67

CiNii Research

Impacts of group-based signal control policy on driver behavior and intersection safety Open Access

Tang K., Nakamura H.

IATSS Research Vol. 32 ( 2 ) page： 81 - 94 2008

Publisher：IATSS Research

Unlike the typical stage-based policy commonly applied in Japan, the group-based control (often called movement-based in the traffic control industry in Japan) refers to such a control pattern that the controller is capable of separately allocating time to each signal group instead of stage based on traffic demand. In order to investigate its applicability at signalized intersections in Japan, an intersection located in Yokkaichi City of Mie Prefecture was selected as an experimental application site by the Japan Universal Traffic Management Society (UTMS). Based on the data collected at the intersection before and after implementing the group-based control policy respectively, this study evaluated the impacts of such a policy on driver behavior and intersection safety. To specify those impacts, a few models utilizing cycle-based data were first developed to interpret the occurrence probability and rate of red-light-running (RLR). Furthermore, analyses were performed on the yellow-entry time (Ye) of the last cleared vehicle and post encroachment time (PET) during the phase switching. Conclusions supported that the group-based control policy, along with certain other factors, directly or indirectly influenced the RLR behavior of through and right-turn traffics. Meanwhile, it has potential safety benefits as well, indicated by the declined Ye and increased PET values. © 2008 International Association of Traffic and Safety Sciences.

DOI： 10.1016/S0386-1112(14)60211-9

Open Access

Scopus

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Papers - NAKAMURA, Hideki