考虑倒计时的交叉口公交优先检测器布设位置研究

Detector Location for Transit Signal Priority at Intersection with Countdown Signals

交叉口公交主动优先策略主要依靠检测器对公交车辆运行情况进行分析,通过适当调整交叉口信号控制方案,从而实现公交车辆的优先通行。研究了考虑倒计时情况下的公交相位绿灯延长、绿灯提前2种公交优先感应控制策略的优化机理;针对设置有交通信号倒计时装置的交叉口,分析了倒计时信号对优先策略实施效益的影响,并依据优先判断区间的分析,提出了检测器布设的最佳位置。随后应用Vissim仿真软件以及VisVAP编程语言以上海市北京西路—威海路交叉口为例建立仿真分析模型,分析检测器布设于不同位置时公交车辆的延误情况,分析结果表明按所提出的计算方法布设检测器后,得到的优先效果最佳。

Transit signal priority（TSP） control mainly relies on detectors,which can be used to analyze the running condition of buses and adjust signal plan of intersections to achieve bus priority.This paper studies the working principles of two bus priority strategies,green extension and early green,at the intersection with countdown signals.The influences of countdown signals on TSP operation are analyzed,together with alternative detector location study to find the optimal plan based on priority intervals.The strategies are tested by using field conditions at the intersection of the Beijing West Road and Weihai Road in Shanghai,where the simulation model is built in Vissim and VisVAP.With this model,the plans,in which detectors are located differently,are simulated to produce corresponding bus delay conditions.The outcome indicates that the most effective TSP occurs when the detectors are placed according to the method proposed in this paper.