车联网环境下城市快速路出口匝道及地面道路邻近区域多级控制方法

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.