开放性边界条件下双车道元胞自动机交通流模型耦合效应研究

A study of coupling effect in cellular automata model of traffic flow for two-lane with open boundary conditions

在一种改进的Nagel Schrekenberg元胞自动机交通流模型的基础上 ,提出一个高速公路双车道元胞自动机模型来模拟开放性边界条件下的车流运动 ,并考虑两车道之间左边界开放程度的比例系数α及车辆加减速概率p的影响 .计算机数值模拟结果表明 ,在车流状态的演化过程中 ,通过确定车道耦合系数b来控制车流量 ,不同的b值车流量不同 ,对车辆运动出现堵塞项的相变点有影响 .

An improved two-lane cellular automaton model for, traffic flow was proposed to describe the highway traffic under the opening boundary conditions by considering the relative motion of vehicles and the relation of deceleration probability. Numerical simulation have been carried out. The results show the complicated evolution process of traffic flow. The flow of vehicles can be controlled by the coupling coefficient b. Different values of b have different. effects on the critical point from free to jam phase.