城市路网交通控制方案关联性分析

由于城市交通网络中交通流固有的时间和空间关联性，交叉口间的信号控制方案也具有一定的关联性。通过VISSIM仿真的方法，研究了周期、绿信比和饱和度对邻近交叉口控制方案的影响，这种影响可分为两个方面，对邻近交叉口控制效果的影响和邻近交叉口配时参数进行的调整。结果表明周期不会改变邻近交叉口的流量，但是绿信比和饱和度均会改变。3种因素都会显著地改变邻近交叉口的控制效果。而且流量的变化规律性较强，但控制效果的变化更复杂，难以事先预知。

Analyze Correlations of Traffic Control Plans in Urban Road Networks

Because of inherent correlation of traffic flow in time and space in urban transport network, signal timing plan of an intersection were also closely interconnected with the adjacent ones. In this paper, VISSIM simulation method wad used to study the effect of cycle, split and saturation degree on the timing plans of adjacent intersections. However this effect can be divided into two aspects, the change of control performance of the adjacent intersections and timing plan parameters adjustments in the adjacent intersections. The results showed that cycle cannot change the volume of adjacent intersections, while split and saturation degree can. All three factors had significant impacts on the traffic control performance of adjacent intersections. Changes in volume were of notable regularity, but the changes of control performance were more complex and difficult to predict in advance.