无信号T型交叉口左转车辆转向灯对交通流影响研究  

Research on the influence of turn signal on traffic flow for left-turning vehicles at unsignalized T-intersection

作　　者：刘天阳 邹常丰[1] 赵博佳 许莹 LIU Tianyang;ZOU Changfeng;ZHAO Bojia;XU Ying(School of Transportation,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学交通学院,黑龙江哈尔滨150040

出　　处：《交通科技与经济》2021年第3期42-48,67,共8页Technology & Economy in Areas of Communications

基　　金：中央高校基本科研业务费专项资金(2572019BG03)。

摘　　要：为研究无信号T型交叉口左转车辆转向灯对道路交通流的影响,建立无信号T型交叉口处路段元胞自动机模型,在开放边界条件下研究左转车辆转向灯开启位置距交叉口的距离对交叉口处交通流影响。研究表明:左转车辆转向灯开启位置距交叉口的距离与交叉口处路段平均行驶速度、车流密度关系密切。左转车辆在通过无信号T型交叉口之前,提前开启转向灯为后方车辆提供变道信息,有利于提高交叉口处的车流通行效率,但过早开启转向灯会造成道路资源浪费,同时降低相邻车道的车流通行效率,会对相邻车道车辆的正常行驶产生较大影响。In order to study the influence of turn signal for left-turning vehicle on traffic flow in unsignalized T-shaped intersections,a cellular automata model of the road section at unsignalized T-shaped intersections is established,and the effect of blinking distance is presented under open boundary conditions.Studies have shown that the flashing distance of the left-turning vehicle's turn signal is closely related to the average vehicle speed and traffic density at the intersection.Before a left-turning vehicle passes through an unsignalized T-shaped intersection,it should turn on the turn signal in advance to provide lane change information for vehicles behind,which is beneficial to improve the efficiency of traffic flow in the intersection,but turning on the turn signal too early will cause a waste of road resources.At the same time,the efficiency of traffic flow in adjacent lanes is reduced,which has a greater influence on the normal driving of vehicles.

关 键 词：无信号T型交叉口 交通流 左转车辆 转向灯 元胞自动机 

分 类 号：U491.1[交通运输工程—交通运输规划与管理]