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Midblock U-Turn and Elevated U-Turn Safety and Economy Comparison: A Case Study Application

Civil and Environmental Engineering • 2021
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Publication Information
Authors Osama H Ahmed, Ibrahim MI Ramadan, Mohamed S Abdel-Monem
Keywords Not Available
Journal Civil and Environmental Engineering
Publisher Not Available
Volume 17
Issue 1
Pages 139-149
publication.type International
Paper Link Not Available
Supplementary Materials Not Available
Abstract
In Egypt, intersections are encountering congestion and safety problems. Midblock U-turns have been used for solving these problems. The midblock U-turn increased the accidents, besides, it has limited capacity. In the last decade, elevated U-turns have been applied to solve these problems. The extensive use of elevated U-turns has not been accompanied by any research for studying the performance of elevated U-turns with respect to safety and economy. This paper developed a simple framework for comparing elevated and traditional midblock U-turns in terms of safety and economy. The study applied a case study to evaluate the two alternatives using a benefit-cost analysis technique. Although the results show the high cost of the elevated U-turns, it has been demonstrated to be the best solution since they provide the greater traffic capacity and lower accident rates. Accident number reported at elevated U-turns was 59% less than the number associated with traditional U-turns.