T型交叉口移位左转几何设计及信号配时优化  

Geometric Design and Signal Timing Optimization of Displaced Left-turn at T-shaped Intersection

作　　者：王旭 安文娟[2] 王少飞[2] 朱湧[2] WANG Xu;AN Wenjuan;WANG Shaofei;ZHU Yong(Chongqing Yurong Expressway Co.,Ltd.,Chongqing 400021;China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)

机构地区：[1]重庆渝蓉高速公路有限公司,重庆400021 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2022年第6期149-155,共7页Technology of Highway and Transport

基　　金：重庆市技术创新与应用发展专项重点项目(cstc2021jscx-gksbX0057)。

摘　　要：为降低T型交叉口中左转和直行冲突对通行效率的影响,通过分析T型交叉口移位左转设计车辆运行规则,协调主预信号配时,制定信号控制相位方案,以避免车辆二次停车,提出了T型交叉口移位左转几何设计方法,包括平行流交叉口和连续流交叉口2种移位左转设计。以T型交叉口车均延误最小化作为优化目标,建立T型交叉口移位左转设计信号配时优化模型,并进行案例分析。结果表明:1)相对于常规设计,采用移位左转设计能降低20%~40%的车均延误,有效提升了T型交叉口通行效率;2)对比平行流交叉口和连续流交叉口2种移位左转设计,当主路左转交通流量较大时,宜采用连续流交叉口设计,当支路左转交通流量较大时,宜采用平行流交叉口设计。In order to reduce the impact of the conflict between left turn and straight turn on the traffic efficiency at T-shaped intersection,a geometric design method of left turn of T-shaped intersection was proposed,including two kinds of left turn of parallel flow intersection and continuous flow intersection,through the analysis of T-shaped intersection displaced left-turn design vehicle running rules,coordinating the timing of the main pre-signal,and developing the signal control phase scheme to avoid the secondary parking of vehicles.Taking the minimization of vehicle average delay at T-intersection as the optimization objective,the signal timing optimization model of displaced left-turn design at T-intersection is established,and the case is analyzed.The results show that the displaced left-turn design can reduce the vehicle delay by 20%-40%,and effectively improve the traffic efficiency of T-shaped intersection,compared with the conventional design.Compared with two kinds of displaced left-turn design of parallel flow intersection and continuous flow intersection,when the main road has large left turn traffic flow,the continuous flow intersection design should be adopted,and when the branch road has large left turn traffic flow,the parallel flow intersection design should be adopted.

关 键 词：交通工程 信号控制 非线性规划 平行流交叉口 连续流交叉口 移位左转 

分 类 号：U491[交通运输工程—交通运输规划与管理]