基于劲松东口的信号灯模糊控制策略

Fuzzy Control Strategy of Traffic Signal at Jinsong East Intersection

随着城市化进程的加快,车辆的激增,城市道路交叉口变得越来越拥挤,已成为道路交通的瓶颈。用模糊控制方法对单路口交通信号进行控制,综合考虑当前相、后继相的车辆排队长度,以此决定绿灯时间分配。该控制策略通过模拟交通指挥者实际进行交通控制的特点,使控制系统能够实时根据各相位车辆的多少进行信号的智能控制。将此方案应用于劲松东口交叉口作为研究背景,仿真结果表明,采用模糊控制方法结果令人满意,效果优于现行的定时控制。该模糊控制方案能更有效地处理随机性较大、不确定性较强的交通流。

With the fast development of urbanization and the rapid increment of vehicles in the urban area in recent twenty or thirty years,the urban intersections become more and more crowded, and they turn to be the bottle - neck of the urban mixed traffic controlling. This paper presents a fuzzy control system strstegy for a isolated intersection. The fuzzy controller is responsible for controlling the length of the green time according to queue length of current phase and next phase. Through imitating the ways of traffic police managing the traffic, this signal control strategy has the ability of intelligent phase controlling in the light of the real traffic flow. A simulation experiment is performed to measure the capability of above fuzzy controller at Jin Song west intersection. The simulation shows that the results of the fuzzy controller are satisfactory, and the fuzzy method overmatches the time method. The strategy can deal with more stochastic and more uncertain traffic flow.