交通灯控制下主干道的交通流研究

用元胞自动机模型模拟二维交通流.通过交叉口设置的红绿灯，研究交通激波的形成和传播 ；对于一定的红绿灯周期，交通流量出现多个极值现象；在交叉口间隔相同的情况下，对于 一定的红绿灯周期，在一定的车辆密度范围内，交通流量是一个与密度无关的常量；在车辆 密度较高的情况下，交叉口间距大于某一值后，交通流量保持恒定值. 关键词： 元胞自动机模型 交通流 交通激波

A study on the traffic flow of the main road under the traffic light control

A cellular automata model is presented to simulate the traffic flows on a main road in city network in which there are traffic lights at the intersections.We have investigated how the traffic shock wave forms and how it spreads.It is found that the traffic flows have several peak values.When the distances between the intersections are equal,for a fixed value of cycle times of the traffic lights,the current does not depend on the density of vehicles for a range of density.For a high density,when the distance between the intersections is greater than a certain value,the traffic flow maintains constant.