Research On Timing Optimization Algorithm Of Transit Signal Priority Baced On Vehicle Positioning Information

Transit Signal Priority (TSP) has been shown to play a significant role in coordinated signal control of major road. Although new GPS (Global Position System) technology has an immense effect on the development of TSP, related algorithm has not been a systematic analysis.With the application and popularization of new GPS technology in information collection, the more accurate algorithm becomes possible.This paper analyzes and summarizes the investigation method of traffic data based on TSP. New ideas are brought in classical algorithm. And coordinated control of major road signals is operated by new arithmetic.Firstly, the investigation method of traffic data is analyzed and summed up considering the implementation conditions of TSP. Secondly, the characteristic of bus testiong data is studied systematically. This paper proposes accuracy calculation method when buses reach the stopping line based on exponential smoothing methond and WLS method. Thirdly, timing optimization method of bus priority is established in the real-time information conditions. In order to simulate the bus flow the maximum likelihood method (MLM) are presented based on communication technology of GPS. Finally signal timing parameters are obtained by the enumeration method.In this paper, the road facilities, traffic signal timing, bus stations and bus lines of the Yuhua Road and Zhonghua Street in Shijiazhuang are investigated. And the related sections are analyzed. The results show that the new algorithm compared with classical algorithm effectively reduce the average people delay to17.2%and31.8%, and reached the effect to be hoped.