交叉口动态车道功能与信号控制协同问题研究

Study on Synergy Problem of Dynamic Lane-use Assignment and Signal Control at Intersections

基于信号控制交叉口时空关系分析,综合运用交通流理论和信号控制技术,建立了动态车道功能与信号相位组合模型,用Visual Basic语言编制程序对该模型求解.为验证模型的有效性,应用该模型对实际案例进行了优化,并通过交通仿真软件VISSIM分别对优化前后的方案进行了仿真对比分析.仿真结果表明:交叉口动态车道功能与信号控制存在协同作用,与仅改善车道功能或信号控制相比,实现两者的协同能有效提高交叉口时空资源的利用率,使关键状态参量如延误与排队长度显著降低.

Based on the analysis of space-time relation of signalized intersections, an integrated model for lane-use assignment and signal phase was established using the traffic flow theory and signal control technology synthetically. In order to solve the model, a program was developed through Visual Basic programming. Actual road intersections were optimized by the program and optimal solutions were generated. Then both the origin plan and the optimal solutions were simulated with VISSIM to verify the model. The simulation results show that there is synergetic effect between dynamic lane-use assignment and signal control. Different from improving lane-use assignment or signal plan alone, synergy cann effectively improve the utilization of space-time resources at intersections, thus reducing the key traffic state parameters such as delay and queue length.