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Title:

Gap Acceptance Models for Left-Turning Vehicles Facing Pedestrians at Signalized Crosswalks
Cover of Gap Acceptance Models for Left-Turning Vehicles Facing Pedestrians at Signalized Crosswalks

Accession Number:

01506156

Record Type:

Component

Abstract:

Pedestrian-vehicle conflicts are considered as one of the most common safety problems at signalized intersections. The threat to pedestrian safety is mainly related to the interaction with turning vehicles, especially left-turners (left-hand traffic). This paper aims at analyzing the lag/gap acceptance behavior of left-turning vehicles considering pedestrian movement at signalized crosswalks. Furthermore, this paper addresses the severity of pedestrian-vehicle conflicts by analyzing vehicle speeds at the conflict points. User behavior at several signalized intersections with different geometric characteristics and traffic conditions in Japan are observed by using video cameras. It is assumed that pedestrian movements have their origin at either the near-side or far-side of the crosswalk. Accepted/rejected lags and gaps are extracted and classified depending on the direction of pedestrian movement. Cumulative Weibull distribution function is utilized to fit the observed lag/gap acceptance probabilities. It is concluded that drivers tend to accept shorter lags/gaps between pedestrians coming from the near-side of the crosswalk. Furthermore, it is concluded that drivers tend to accept short lags while being conservative about short gaps between several pedestrians. Simultaneously vehicles clear the conflict area with significantly higher speeds when accepting a lag with a single pedestrian. This indicates that such conflicts are more severe than those when facing several pedestrians.

Supplemental Notes:

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

01501394

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Alhajyaseen, Wael K M
Asano, Miho
Nakamura, Hideki
Kang, Nan

Pagination:

17p

Publication Date:

2011

Conference:

3rd International Conference on Road Safety and Simulation

Location: Indianapolis Indiana, United States
Date: 2011-9-14 to 2011-9-16
Sponsors: Purdue University; Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Pedestrians and Bicyclists; Safety and Human Factors; I83: Accidents and the Human Factor

Files:

TRIS, TRB, ATRI

Created Date:

Jan 29 2014 2:33PM