Title: Development and Evaluation of a Coordinated and Conditional Bus Priority Approach
Abstract: One problem in existing bus priority strategies is that while making decision to grant priority at an intersection, the bus arrival time at the downstream intersections is not considered. Moreover, only strategies for late bus are discussed, the strategies to early bus are seldom studied. This research tests a different bus priority approach, Coordinated and Conditional Bus Priority (CCBP). Coordinated signalized intersection groups are adopted as control objects. Buses are detected one or more cycles in advance of their arrival at the first intersection of the control object. CCBP, including two kinds of priority strategies, increasing bus delay strategies and decreasing bus delay strategies are proposed. A model was built to generate the optimal combination of priority strategies for intersection groups so that the real delay of buses will very close to the permitted delay defined by bus operation system. In the field application, CCBP approach is compared with other two options: no priority and unconditional priority. Significant reductions on bus delay deviation and bus headway deviation were achieved by using the CCBP approach. Application of the CCBP approach resulted in only minor increases in total average delay of motor vehicles. The results of the field application studies performed as part of this study suggested that the CCBP approach could be used to decrease bus delay deviation and enhance the reliability of the bus service without significantly impacting delay of other motor vehicles.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 2
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