十字交叉路口交通流的控制和管理研究

Study of Control and Management at Intersection on Traffic Flow

采用开放边界条件,利用改进的N agel-Schreckenberg模型,引入转向概率,通过数值模拟,研究车辆通过十字交叉路口的交通流特性。结果得到,在开放边界条件下,当车道的产生概率大于消失概率的情况下,具有十字交叉路口的车道车辆密度在红绿灯信号周期较短时,车道车辆密度较高,此时车辆拥堵严重,如果延长红绿灯信号周期或允许车辆在交叉路口转向行驶,可降低车辆密度,改善交通状况,达到科学管理和有效控制车流的高效运行。

The traffic flow of the crossroad in city with turning probability is simulated by using the improved Nagel-Schreckenberg model under open boundary condition. From the result, it can be found that when the input rate is greater than the output rate and the period of traffic light is short, the car density of the crossroad is high. And then the cars are in a serious jam. But when the period of traffic light increases or the cars at the intersection are allowed to turn, the car density will decrease. So it can improve the efficiency of the management and control of the traffic flow.