借BRT车道掉头的交叉口渠化与信号控制优化

Channelization and Signal Control Optimization at Intersections Utilizing BRT Lanes

针对城市快速公交(BRT)时空优先权引发的交叉口拥堵问题,以太原市平阳路与学府街交叉口为例,通过交通调查分析交叉口存在的问题,运用“借BRT车道掉头”的方法对该交叉口的渠化和信号控制方案重新设计,用Vissim交通仿真软件对原方案和设计方案进行对比分析。得出优化后北进口道左转车辆的车均延误与车均停车时间分别下降了15.2 s、13.2 s,掉头车辆的车均延误与车均停车时间分别下降了9.6 s、10.8 s,左转与掉头的平均排队长度降低42%.结果表明:文章所给“借道掉头”设计方法能缓解BRT与其他车辆在平交口的冲突,提高交叉口通行效率。

Aiming at the intersection congestion caused by BRT spatio-temporal priority,taking the intersection of Pingyang Road and Xuefu Street in Taiyuan City as an example,the problems existing at the intersection are analyzed through traffic surveys.The channelization and signal control scheme at the intersection was redesigned,and the original scheme and the design scheme were compared and analyzed using Vissim traffic simulation software.It is concluded that the average delay and average parking time of vehicles turning left on the North Entrance Road have decreased by 15.2 s and 13.2 s,and the average delay and average parking time of U-turn vehicles have decreased by 9.6 s and 10.8 s,respectively.Average queue length with U-turns is reduced by 42%.The results show that the“U-turn U-turn”design method can alleviate the conflict between BRT and other vehicles at level crossings,and improve the traffic efficiency at intersections.