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http://dx.doi.org/10.7470/jkst.2012.30.6.093

Safety Impacts of Red Light Enforcement on Signalized Intersections  

Lee, Sang Hyuk (Urban Engineering, Hanbat National University)
Lee, Yong Doo (Civil and Environmental Engineering, Cornell University)
Do, Myung Sik (Urban Engineering, Hanbat National University)
Publication Information
Journal of Korean Society of Transportation / v.30, no.6, 2012 , pp. 93-102 More about this Journal
Abstract
The frequency and severity of traffic accidents related to signalized intersections in urban areas have been more serious than those in both arterial segments and crosswalks. Especially, traffic accidents involved with injuries and fatalities have caused by traffic signal violations within intersections. Therefore, many countries including Korea have installed the red light enforcement camera (RLE) to reduce traffic accidents associated with the traffic signal violation. Meanwhile, many methodologies have been studied in terms of safety impacts estimation of red light enforcement, which, however, cannot be easy to conduct. In this study, safety impacts was estimated for intersections of Chicago downtown area using SPF models and EB approach. As a result, for all crash types and target traffic accident types such as "angle", "rear end", "sideswipe in the same and other directions", "turn", and "head on", fatal crashes were reduced by 26% and 38%. However, RLE may increase property-demage-only-crashes by 3.23% and 1.16%, respectively.
Keywords
Empirical Bayesian Approach; Negative Binomial Regression; Red Light Enforcement; Safety Performance Function; Zero-Inflated Poisson with Normal Heteroskedasticity;
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