信号交叉口绿灯黄灯时间优化模型的建立

为系统全面地研究交叉路口红绿灯的最佳时间间隔问题，在假定车流均匀的前提下，对于绿灯的最佳时间，采用最短积存车辆长度的方法，在考虑各种因素的情况下，以积存车辆的长度为目标函数，利用lingo软件求得最优解。对于黄灯的最佳时间，采用最长所需时间的方法，计算所需的安全时间，以此作为最佳的黄灯时间，最后以观测资料进行模型验证。

The Optimal Model of Chang Interval for the Signalized Intersection

In order to research the best interval of the traffic light, we assume that the traffic flow evenly. Taking into account various factors ,the best interval of the green light should make traffic shortest,and the best interval of yellow light should ensure the last car safe even in the worst situation. So we build an objective function for the length of cars in jar, by using software of lingo we achieve the optimal solution. Finally, we verify the model with observation data.