城市路网和快速公路交通流的分散协调控制

Distributed and Cooperative Control for the Traff ic Flow of Urban Region and Expressway

利用模糊理论对城市路网和快速公路交通进行实时分散协调控制。把路网和快速公路作为一个大系统,子系统为路网中的各个交叉口,每个子系统有一个控制器,该控制器根据它自己和相邻子系统的交通流信息来动态管理绿灯相位及绿灯时间。控制器有三个模块组成:相序选择模块,绿灯判断模块和相位切换模块。控制器的控制目标是保持快速公路主线密度均衡和路网内各车辆平均延误时间最短。仿真研究表明该方法控制效果较好。

This paper uses the fuzzy theory to solve the real time road networks and expressway traffic distributed control problem. The road networks and expressway are regarded as a large scale system, and the subsystems are the intersections in the road networks. Each subsystem has its own traffic controller which manages the phase of green light and the phase length dynamically according to its own and its neighbor＇ s traffic situations. The controller consists of three modules the phase sequencer, the green phase decider and the phase switch. The object of the controller is to make the expressway unblocked and the average vehicle delay time of networks shortest. The simulation shows good performances.