相邻交叉口相位差优化模型及仿真

由于国内交通流特点与国外有很大不同,导致采用国外的信号控制系统很难达到满意的控制效果。以北京市两个相邻交叉口组成的干道协调控制系统为研究对象,通过分析干道上双向车辆在交叉口的延误规律,考虑车流在行驶过程中的离散性和受阻情况并结合中国道路交通的实际状况,以车辆延误最小为目标,建立了相邻交叉口相位差协调控制的优化模型。针对传统的图解法和数值解法的缺点,采用遗传算法对该模型进行求解。仿真结果证明本文所建立的模型求解结果优于传统数值解法,能更准确地反映实际的交通运行情况和控制效果,是一种减少相邻交叉口车辆延误的有效方法。

Phase-offset optimization model and simulation of adjacent intersections

The domestic urban traffic flow characteristics are different from abroad,so applying the imported coordinated traffic signal control system on the domestic urban arterial road can not obtain satisfactory effect.Taking the coordinated control system on the urban arterial road between two adjacent signaled intersections in Beijing as an example,considering the traffic flow dispersion and the delay on China road traffic,setting the minimal delay at the intersections as the optimization objective,an optimization model on the coordinated control on the phase-offset between the adjacent intersections was built.The genetic algorithm was used to solve the problem to avoid the weakness of the traditional graphical or numerical method.The simulation results show that the new method is better than the traditional ones.The model is able to describe accurately the actual traffic flow and the control effect,to decrease the delay at the adjacent intersections.