大型多环道涡轮环交车道级信号控制方法  

Large Multilane Turbo Roundabout Lane Level Signal Control Method

作　　者：葛慧敏[1] 臧文铠 董磊 周礼军 GE Hui-min;ZANGWen-kai;DONG Lei;ZHOU Li-jun(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]江苏大学,汽车与交通工程学院,江苏镇江212013

出　　处：《交通运输系统工程与信息》2023年第3期123-132,共10页Journal of Transportation Systems Engineering and Information Technology

基　　金：安徽省交控集团科研项目(JSKY-2019-01)。

摘　　要：针对大型多环道环形交叉口车辆频繁换道和进出口处不同流向交通流冲突的问题,本文结合涡轮式环形交叉口在控制车辆换道方面的独特优势,提出车道级左转两步信号控制方法。首先,通过对第1和第2停车线的车辆到达-驶离曲线分析,建立以车辆平均延误最小为目标,信号周期、饱和度及绿灯时长等为约束的信号配时模型。其次,通过建模分析不同控制方法、不同车道数和中心岛半径对车辆平均延误的影响。结果表明:车道级左转两步信号控制方法相较于传统左转两步信号控制方法,延误水平更低,平均可降低6.13 s;随着车道数和交通量的增加,本文提出方法的车辆平均延误增长幅度和速度均较低;中心岛半径越大,车辆平均延误越大,但增加幅度较小。最后,以镇江市梦溪广场无控制大型多环道环形交叉口为例,VISSIM仿真表明:本文所提出的信号控制方法相较于传统左转两步信号控制方法,车辆平均延误降低8.91%,停车率降低6.85%。该信号控制方法结合涡轮式环形交叉口可有效改善大型多环道环形交叉口交通安全及通行效率。The large multilane roundabout normally experiences frequent vehicle lane changes and conflicting traffic flow in different directions at the entrance and exit.This paper proposes a lane level left-turn two-step signal control method combining the unique advantages of the turbo roundabout to control vehicle lane changes.First,through the analysis of the vehicle arrival-departure curves of the first and second stop lines,a signal timing model is established with the minimum average vehicle delay as the target and the signal period,saturation,and green light duration as the constraints.Then,the effect of different control methods,different number of lanes and center island radius on the average vehicle delay is analyzed through modeling.The results show that the lane level left-turn two-step signal control method has a lower delay level compared to the conventional left-turn two-step signal control method,which can reduce the vehicle delay by 6.13 seconds on average.As the number of lanes and traffic volume increase,the proposed method has a lower average delay growth.The larger the radius of the center island,the greater the average vehicle delay,but the increase is marginal.Using the uncontrolled large multilane roundabout at Mengxi Square in Zhenjiang City as an example,VISSIM simulation was performed,and the result shows that the proposed signal control method reduces the average vehicle delay by 8.91%and the stopping rate by 6.85%compared with the traditional left-turn two-step signal control method.This signal control method combining with the turbo roundabout can effectively improve traffic safety and efficiency at large multilane roundabouts.

关 键 词：交通工程 信号控制方法 延误模型 涡轮式环形交叉口 环形交叉口 

分 类 号：U491.5[交通运输工程—交通运输规划与管理]