关键词: 交通运输系统工程, 交通信号协调, 动态路径, 动态速度, 车路协同

Abstract:

Based on the real time information of dynamic route volume, initial queue length, and the real-time vehicle and signal controller communication within vehicle infrastructure integration environment, an route based integrated signal coordination control model is proposed to optimize the dual-direction coordinative routes, the dynamic travel speed, and the specific intersection signal timings. Thus overcomes the drawbacks of the conventional coordinated signal control model that uses those parameters as inputs based on the assumptions that the parameters are fixed and the value is optimal. The product of the output volume and the travel speed is employed as the objective of the propose model. The decision variables include the coordinative routes, travel speed and offset. A set of constraints were set up to ensure feasibility and safety of the optimal results. Compared with the results optimized by classical Maxband model and Synchro program, the proposed model can significantly improve the green wave bandwidth, decrease the number of stops, and increase total coordinated benefits. The sensitivity analyses with fluctuation of traffic flow, section length between intersections, maximum speed limit and degree of saturation further demonstrated the potential of the proposed model to be applied in various traffic conditions.

Key words: engineering of communication and transportation system, traffic signal coordination, dynamic routes, dynamic speed, vehicle infrastructure integration