基于VISSIM仿真的信号交叉口交通效率分析

Analysis of Traffic Efficiency at Signalized Intersections based on VISSIM Simulation

为了提高信号交叉口的交通效率,结合实际信号交叉口,根据交叉口高峰期时段交通流量数据,运用VISSIM软件建立仿真模型。通过调整左转让直行的规则,改变信号配时方案,改变不同类型驾驶员的比例等几种方法,对信号交叉口的通行效率进行仿真,得到了实际交叉口交通效率运行的对比仿真结果。结果表明调整该类型交叉口左转让直行的规则对交通效率的提高不明显;优化交叉口信号配时后的交通效率提高明显;增加交叉口激进型驾驶员的比例,减少保守型驾驶员的比例,交叉口的交通效率下降。

In order to improve traffic efficiency of signalized intersections, a simulation model is built by VISSM software based on traffic flow data of the actual signalized intersection. Adjusting the rule of left-turn vehicle making way for straight-going vehicle, changing signal timing plan, and altering proportions of different types of drivers, the traffic efficiency of intersection is simulated, and the simulation results have been obtained. The results show that, for improving traffic efficiency, it is not obvious to adjust the rule of left-turn vehicle making way for straight-going vehicle, but it is obvious to optimize the intersection signal timing. However, increasing the proportion of aggressive drivers and reducing the conservative ones can reduce traffic efficiency of signalized intersection.