车联网环境下快速路出口匝道与地面衔接区多阶段控制方法

Multi-stage Control Method for Urban Expressway Off-ramps and Ground Road Adjacent Areas under Connected Vehicle Environments

为了提高快速路出口匝道与地面衔接区的通行效率,提出了一种车联网环境下出口匝道与地面衔接区多阶段控制方法。首先,根据速度特性将出口匝道与地面衔接区划分为调整区、缓冲区和排队区。然后,针对衔接区车辆冲突频繁问题,提出了一种考虑相位优先级的车道变换策略。最后,在此基础上设计了三阶段快速路出口匝道与地面衔接区控制方法,并基于MATLAB和VISSIM搭建了车联网仿真环境。仿真结果表明:文中方法控制下衔接区路段间速度波动更小,平均速度提高了5%;与车联网速度控制相比,衔接区、排队区和缓冲区的延误分别降低了4%、6%和4%。此外,敏感性分析可知:当衔接区交通需求处于中等饱和度和渗透率大于70%时,本文方法控制效果优势最为明显。相关成果可为车联网环境下出口匝道与地面衔接区控制提供理论支持。

To improve the traffic efficiency of urban expressway off-ramps and ground road adjacent areas,a multi-stage control method is proposed for an off-ramp and ground road adjacent area under a connected vehicle environment.First,according to vehicle speed characteristics,the selected adjacent area is divided into adjustment,buffer,and queuing areas.Then,considering the problem of frequent conflicts between vehicles in adjacent area,a lane-changing strategy is proposed that considers phase priority.Finally,a three-stage control strategy is designed for the off-ramp and ground road adjacent area,and a simulation environment of connected vehicles is built based on MATLAB and VISSIM.Simulation results show that the proposed method can reduce speed fluctuations between each road section while increasing the average speed by 5%.Compared with the speed control under connected vehicle environments,the delays in the adjacent,queuing,and buffer areasare reduced by 4%,6%,and 4%,respectively.In addition,a sensitivity analysis shows that when the traffic demand is in medium saturation and the penetration rate is greater than 70%,the control effect of the proposed method is the most obviou.The relevant results can provide theoretical support for off-ramps and ground road adjacent areas under connected vehicle environments.