基于干线协调的公交信号优先方法研究

以多个交叉口组成的干线路段为研究对象,提出一种基于干线协调的公交信号优先控制方法以实现交叉口所有车辆整体效益的最优。该系统由公交请求生成系统、通信系统、交通信号控制系统组成,通过双层优化的方法,即干线协调处于双层优化方法的上层,公交优先处于双层优化方法的下层,并以干线协调作为公交优先的前提条件,通过红灯早断和绿灯延长策略实现公交信号优先。具体案例分析表明,在不违背干线协调这一前提条件下给予到达交叉口的公交车以优先通行权,可以减少公交车辆在线路各个交叉口的等待时间,同时公交相位社会车辆的延误也得到降低。

Research on Bus Signal Priority Method Based on Trunk Line Coordination

Taking a trunk line section composed of several intersections as the research object, a bus signal priority control method based on trunk line coordination is proposed to realize the optimal overall benefit of all vehicles at the intersection. The system is composed of bus request generation system, communication system and traffic signal control system. Through the method of double-layer optimization, that is, the trunk line coordination is in the upper layer of the double-layer optimization method, the bus priority is in the lower layer of the double-layer optimization method, and the trunk line coordination is taken as the precondition of the bus priority, the bus signal priority is achieved through the red light early break and the green light extension strategy. The concrete case analysis shows that the priority right of passage is given to the bus arriving at the intersection without violating the precondition for trunk line coordination. It can reduce the waiting time of bus vehicles at various intersections of the line, and the delay of social vehicles in bus phase is also reduced.