This paper summarizes the results of a safety analysis of the roundabouts located in the Las Vegas metropolitan area in the USA. The Las Vegas metropolitan area has had several new roundabouts installed over the last decade or so. The evaluation consists of a comparison of traffic crashes in the proximity of roundabouts with those at comparable conventional stop controlled and signalized intersections. Traffic volumes were used to normalize the number of crashes. Five years of crash data were used for the study and the comparison of the intersection controls is done with respect to the time of the crash, contributing factors, type of crash, roadway conditions etc. Statistical tests were used to evaluate the significance of these results. The results indicate that intersections that had minor and medium levels of traffic volumes roundabouts were generally safer than the intersections that were stop controlled and signalized. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E213531.
Samenvatting