关键词: 城市交通, 公交信号优先, 优先级, 优先策略, 延迟, 层次分析法

Abstract: Nowadays, traffic congestion is getting more and more serious in big cities. Public transportation system is an effective solution to this problem. Thus, bus signal priority control is very important to improve the efficiency and service level of public transportation. This paper proposes a novel city main road bus signal priority model, analyzes and demonstrates its impact. According to this model, we simulate the mode of transit signal priority and obtain satisfactory results. First, we use “single path of travel distribution method” to calculate OD matrix on the basis of the collected traffic flow data. Second, we use the GIS information to reconstruct the network in the micro-traffic emulational software “Paramics”. Third, we introduce the Analytic Hierarchy Process（AHP）to set the priority factors of four different vehicles according to traffic management strategy. Finally, we design a special control strategy to reduce the overall delay of buses. Simulation results show that after using the priority signal control programs, the delay of buses and other road priority vehicles, even that of all the vehicles has reduced as a whole. The results confirm that the application of priority signal control program can partially solve the access problems of buses and other vehicles which have the road priority.

Key words: urban traffic, bus signal priority, priority rank, priority strategy, delay, Analytic Hierarchy Process（AHP）