连续流交叉口通行效率仿真分析

Simulation Analysis on Traffic Efficiency at Continuous Flow Intersection

针对现有交叉口左转车流与直行车流交叉冲突,车流不连续,运行效率低的问题,选取国外多个城市已经投入使用并取得良好效果的连续流交叉口为分析研究对象。介绍了连续流交叉口基本概念,在连续流交叉口车流组织和信号控制方案的基础上,利用Vissim仿真软件构建了连续流交叉口运行仿真模型,选取车辆延误为评价指标,对连续流交叉口的通行效率进行了评价分析。研究结果表明:随着连续流交叉口主信号交叉口与预信号交叉口间距的不断增加,左转车辆的平均延误没有明显变化,而直行车辆的车均延误缓慢增加;连续流交叉口左转车辆的车均延误较传统交叉口减少25%;直行车辆的车均延误较传统交叉口减少45%。

For the problems of the left turn traffic flow intersected and collided with the straight traffic flow,the discontinuous traffic flow and the low operation efficiency at the existing intersections, and selecting the continuous flow intersections already put into use with the good effects in many foreign cities as the objects of analysis and study, the article introduces the basic conception of continuous flow intersections. On the basis of the traffic flow organization and signal control scheme for the continuous flow intersections, the VISSIM simulation software is used to build a continuous traffic flow intersection simulation model. The vehicle delay is selected as the evaluation index for evaluating and analyzing the traffic efficiency of the continuous flow intersection. The result shows that the average delay of the left-turn vehicle is not changed significantly with the continuous increment of the distance between the main signalized intersection and the pre-signalized intersection at the continuous flow intersection, and that the average vehicle delay of the straight vehiclesslowly increases. The average delay of the left-turn vehicles at the continuous traffic intersection is 25% lower than that of conventional intersection, and the average delay of the straight vehicles is 45% lower than that of conventional intersections.