中文摘要：

城市交通干线在高峰时期经常处于饱和状态,排队车辆溢出至上游交叉口的＂死锁＂现象时有发生.为避免干线阻塞、提高饱和条件下干线交通流的运行效率,首先提出一种有效带宽评价方法对已有干线绿波协调控制系统的运行状态及控制效果进行监控;其次借鉴TCP/IP窗口流量控制思想,设计一种窗口流量控制的干线动态协调控制方法,控制城市干线拥挤交通流.模拟试验及对比结果表明,通过窗口流量通告的方式,下游交叉口可以向上游交叉口实时告知路段的有效容量,便于各交叉口信号机根据当前的交通需求及路段的有效容量重新分配各股车流的绿灯时间.

英文摘要：

The traffic in arterial intersections is usually over-saturated;and gridlock occurs very frequently in rush hours.In order to improve the efficiency of traffic flow control and prevent the arterial system from traffic jam,we propose a method for analyzing the available bandwidth to supervise states of the arterial traffic signal control system.On this basis,we promoted by the idea of window flow control in TCP/IP,present a scheme of traffic signal control for arterial intersections to reduce traffic congestion.Simulation demonstrates that the downstream intersections are continuously providing their effective capacity to the upstream intersections through the flow window;by this information and the current traffic demand,the upstream intersections assign green time to each traffic stream accordingly.