Protected and protected/permitted are two major left-turn control types at signalized intersections. Selection of one control over the other usually involves comparing results in the aspect of efficiency versus safety. This paper presents an economic analysis approach to assessing protected/permitted left-turn control versus protected only left-turn control. The approach involves a benefit-cost analysis of utilizing simulation tools and statistical methods to evaluate the change of left-turn control type from protected only to protected/permitted at signalized intersections. A case study was conducted to demonstrate the application of the approach. Based on the analysis results of the case study, it shows that by implementing protected/permitted left-turn control instead of protected only, the benefit from improved efficiency exceeds the cost from increased accidents, which provides justifications of the change of the left-turn control type at the study intersection.
An Economic Analysis Approach to Assessing Protected Only versus Protected/Permitted Left-Turn Controls at Signalized Intersections
Sixth International Conference of Traffic and Transportation Studies Congress (ICTTS) ; 2008 ; Nanning, China
17.07.2008
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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