快速公交预感应信号优先协调控制策略

Pre-Detective Signal Priority Coordination and Control Method for Bus Rapid Transit

提出了一种考虑交叉口协调控制的预感应公交信号优先策略,包括两个部分:信号配时优化和协调控制。假设公交车行驶时间已知的情况下,该策略通过按绿信比分配理想时间差和基于公交车站点时空距离转换的改进数解法来实现交叉口的配时优化和协调控制。为了获得该策略的实施效果,以常州市通江南路两相邻交叉口的单个方向为例,设计了四种信号控制情景(无优先、传统优先、预感应优先和预感应协调优先),并利用微观仿真软件VISSIM进行仿真分析。结果表明,四种情景中预感应协调优先策略大大减小了公交在交叉口的延误,提升了公交服务的可靠性,并且对社会车流的干扰最小。

A pre-detective signal priority method for Bus Rapid Transit （BRT） with coordination andcontrol between intersections along the arterial was proposed, and two parts were included： signal optimi.zation and coordination control. As the bus travel time was known, the signal timing was optimized by ad.justing ideal signal lag in green ratio of each phase and coordinating the intersections by the improvednumerical method to exchange the dwell time at bus stop to the distance in space. To examine the effectof this method, one direction of South Tongjiang Road in Changzhou, Jangsu, was experimented with themicroscopic traffic simulator VISSIM, and four simulation scenarios were set： no signal priority, tradition.al signal priority, pre-detective signal priority and pre-detective signal priority with coordination. Theresults show that pre-detective signal priority with coordination has the best effect in the four scenariosfor BRT, but the least negative effects of signal priority for social traffic.