TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Using Individual Speed Profile to Evaluate the Effectiveness of Speed Bumps on Chinese Campus

Accession Number:

01516129

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The objective of this study was to evaluate the effectiveness of speed bumps on Chinese campus based on individual vehicle trajectories and speed profiles. An observational before after study was conducted to collect vehicle spatio-temporal information with a high resolution camera. Accordingly, the collected data was divided into two groups: the before group, including vehicle trajectories and speed profiles with no speed bump deployed in the defined research area, and; the after group, containing trajectories and speed profiles after a 5cm high speed bump installed at the designated location. A total of 230 free flowing vehicle trajectories and speed profiles were extracted from the video tape and 113 vehicles for the before group and 117 vehicles for the after group, respectively. First, the effectiveness of the speed bump was evaluated using conventional speed indicators, i.e. the mean speed, the 85th percentile speed and the percentage of drivers exceeding 30 km/h. Although an obvious reduction in the mean speed was observed in the after group, the changes in the mean speed and the 85th percentile speed along the target road segment, i.e. the special impact of the speed bump, was not significant. In order to address this issue, vehicle trajectories and speed profiles were analyzed as well. The results indicate that drivers yielding behavior, including changes in travel direction and reduction in vehicle speed, could be more precisely captured using vehicle trajectories and individual vehicle speed profiles in comparison to conventional speed indicators.

Supplemental Notes:

This paper was sponsored by TRB committee AHB50 Traffic Control Devices.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-3638

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Gong, Linfeng
Liu, Yingshun
Guo, Tangyi
Liu, Kang

Pagination:

18p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures (4) ; Photos (2) ; References (19) ; Tables (2)

Geographic Terms:

China

Subject Areas:

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-3638

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 3:15PM