基于VISSIM的交叉口信号控制优化

Optimization of Intersection Signal Timing Based on VISSIM

城市十字路口较多,加之信号配时不合理,车辆通过就会干扰频繁,使得延误时间过长,十字路口的通过量低。文章以桂庙村口交叉口为例,在对该路口交通流量数据调查的基础上,运用VISSIM建立微观仿真模型,检验仿真与现实路口的相似度,通过"等效交通量"方法优化配时方案,并对优化前后的配时方案进行仿真评价。仿真结果表明:优化方案使得交叉口停车时间下降了10.96%,平均排队下降了15.82%,通过车辆数增加了12.92%,说明优化配时方案能够有效提高该交叉口的服务水平,提高通行率。

Taking Guimiaocunkou intersection for example, this paper established a traffic simulation to test similarity between simulation and reality intersection by using VISSIM software based on a traffic flow survey. Then it analyzed the intrinsic signal timing and proposed signal timing. The results of the simulation indicated that the parking time decreased by 10.96%, the average queue length decreased by 15.82% and the traffic volume increased by 12.92%. It showed that optimizing distribution scheme could effectively improve the intersection service level and traffic rate.