SAFETYLIT WEEKLY UPDATE

We compile citations and summaries of about 400 new articles every week.
RSS Feed

HELP: Tutorials | FAQ
CONTACT US: Contact info

Search Results

Journal Article

Citation

Chai C, Wong YD, Lum KM. Traffic Injury Prev. 2015; 16(4): 374-379.

Affiliation

Centre for Infrastructure Systems, School of Civil and Environmental Engineering , Nanyang Technological University , 50 Nanyang Avenue, Singapore.

Copyright

(Copyright © 2015, Informa - Taylor and Francis Group)

DOI

10.1080/15389588.2014.942418

PMID

25022310

Abstract

OBJECTIVE This study applies a simulation technique to evaluate the hypothesis that red-light cameras (RLCs) exert important effects on accident risks. Conflict occurrences are generated by simulation and compared at intersections with and without RLCs to assess the impact of RLCs on several conflict types under various traffic conditions.

METHOD Conflict occurrences are generated through simulating vehicular interactions based on an improved Cellular Automata (CA) model. The CA model is calibrated and validated against field observations at approaches with and without RLCs. Simulation experiments are conducted for RLC and non-RLC intersections with different geometric layout and traffic demands to generate conflict occurrences which are analyzed to evaluate the hypothesis that RLCs exert important effects on road safety.

RESULTS The comparison of simulated conflict occurrences show favorable safety impacts of RLCs on crossing conflicts, and unfavorable impacts for rear-end conflicts during red/amber phases. Corroborative results are found from broad analysis of accident occurrences.

CONCLUSIONS The RLCs are found to impose mixed effect on accident risk at signalized intersections: crossing collisions are reduced while rear-end collisions may increase. The specially-developed CA model is found to be a feasible safety assessment tool.


Language: en

NEW SEARCH


All SafetyLit records are available for automatic download to Zotero & Mendeley
Print