车道宽度对信控交叉口通行能力及车辆延误影响研究

Effect of Lane Width on Traffic Capacity and Vehicle Delay of Signalized Intersection

研究了交叉口交通流量均衡分布、交通流量非均衡分布、改变左转车流量比例3种不同条件下,车道宽度不同对信控交叉口通行能力及车辆延误的影响。运用VISSIM模拟仿真软件,对城市道路中单车道宽度不同情况下的4路双车道信号控制交叉口的通行能力以及车辆平均延误进行比较分析。研究发现,在一定的车道宽度范围内,车道宽度较小的交叉口通行能力比车道宽度较大的交叉口通行能力小,且车道宽度较小的交叉口车辆延误相对较大;同时左转车流比例的不同也会影响车辆延误的大小,由此为交叉口设计提供相关依据。

The effect of lane width on signalized intersection traffic flow and vehicle delay is respectively studied under three conditions： balanced distribution of traffic flow, unbalanced distribution of traffic flow and the changed proportion of left-turning traffic flow. By VISSIM simulation software, comparative analysis on traffic capacity and vehicle delay of four two-lane signalized intersections in different widths is conducted. It is found that within a certain range of lane width, the traffic capacity of intersection in smaller lane width is worse than that in relatively larger lane width, and vehicles delay of intersection in smaller lane width is relatively larger; in addition, the proportion of left-turning traffic also affects vehicle delay. This study tries to provide reference for the design of intersections.