关键词: 城市交通, 快速路, 控制算法, 级联信号控制, 仿真分析

Abstract:

Frequent congestion has appeared in urban expressway during peak period, so it is necessary to guide the main line congestion of expressway. In this paper, through the three-level traffic detection and discrimination in the main line and on ramp, the multi- level coordinate signal control process and implementation mode are designed, and the hierarchical response control strategy under different congestion levels is constructed. Based on the real-time signal control algorithm under the bottleneck capacity maximization and the real-time signal control algorithm under the maximum queue length restriction, the multilevel coordinate signal control method is established, which integrates the opening and closing of the main line and ramp lane, the signal light control at the junction, the dynamic speed limit of the main line and the traffic information guidance. The simulation results show that the method can effectively improve the average speed of the main line of the expressway, which does not lead to the deterioration of ramp queuing, and the average delay of the local road network is significantly reduced.

Key words: urban traffic, expressway, control algorithm, multilevel coordinate signal control, simulation analysis