城市道路交叉口左转车道设置分析  

Analysis of Left Turn Lane Guidelines at Urban Road Intersections

作　　者：张业兴 Zhang Yexing(Beijing General Municipal Engineering Design&Research Institute Co.,Ltd.,Beijing 100082,China)

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082

出　　处：《市政技术》2023年第3期115-121,共7页Journal of Municipal Technology

摘　　要：城市道路交叉口作为路网的节点,承担了不同流向的车流和行人流。其中,左转车流对交叉口通行能力和交通安全的影响尤为重要。因此,对不同左转车道设置方式的车辆流线进行分析,发现采取“内移”的方式增设左转车道可以避免左转车辆和直行车辆交织变道;然后提出了一种可以变相“内移”左转车道的鱼腹形交通导流线优化设置方式,并借助VISSIM仿真软件对采用不同左转车道增设方式的交叉口通行能力进行了分析计算;最后以北京市某道路交叉口为例进行了仿真验证。分析结果表明:优化后的鱼腹形交通导流线在对左转车辆和直行车辆有序分流的同时,还能保证左转车道有足够的排队长度,较未设置鱼腹形交通导流线的车道,可在一定程度上降低交叉口总车均延误。As the node of the road network,the urban road intersection undertakes traffic flow and pedestrian flow in different directions,among which left-turning vehicles are particularly important for traffic capacity and traffic safety.The vehicle flow lines under different ways of adding left turn lane are analyzed in this article.That adding left turn lane with“move inward”can avoid cross-cutting lanes between left-turning vehicles and straight-going vehicles;Then,an optimized setting method of fish-belly-shaped marking is proposed which can“moving inward”left turn lanes in disguised form.The traffic capacity of road intersections under different setting methods of left turn lanes are analyzed and calculated by VISSIM;Finally,a road intersection in Beijing is taken as an example for simulation verification.The results show that the optimized fish-belly-shaped marking can not only divide left-turning vehicles and straight-going vehicles in an orderly manner,but also ensure that the left-turn lane has sufficient waiting space.And compared with the lanes without fish-belly-shaped marking,the average delay of vehicles entering the intersection can be reduced to a certain extent.

关 键 词：城市道路 左转车道 通行能力 鱼腹形交通导流线 仿真分析 

分 类 号：U491.234[交通运输工程—交通运输规划与管理]