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http://dx.doi.org/10.7470/jkst.2016.34.4.291

A Meta Analysis of the Effects of Road Safety Facilities on Accident Reduction: Focusing on Signalized Intersection  

CHOI, Ji Hye (Department of Transportation Engineering, University of Seoul)
LIM, Joon Beom (Department of Transportation Engineering, University of Seoul)
LEE, Soo Beom (Department of Transportation Engineering, University of Seoul)
Publication Information
Journal of Korean Society of Transportation / v.34, no.4, 2016 , pp. 291-303 More about this Journal
Abstract
The number of traffic accidents at intersections has been increased over the past decade, and in 2014, accounted for 44% of the total traffic accidents. In addition, since most of road accident black spots include signalized intersections, the improvement of safety on signalized intersection is top priority for national road safety program in Korea. For the decision of most effective action plan for the safety of signalized intersection, this study conducted meta-analyses to assess the effects of various road safety facilities at signalized intersection on traffic accidents. We selected 19 articles regarding the prediction of traffic accidents at signalized intersection and calculated 34 individual effect sizes on 8 variables included in the articles. The results found that there was a statistically significant negative relationship between the occurrence of traffic accident and the presence of all of road safety facilities except an exclusive left turn bay. It shows that most of the road safety facilities could prevent traffic accidents, and intersection channelization has the most effective on the reduction of traffic accidents followed by left-turn acceleration lane, lightning, crosswalk, exclusive right-turn lane and median barrier.
Keywords
effect of reducing accidents; effect size; meta-analysis; road safety facilities; signalized intersection;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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