换道概率对二维元胞自动机交通流量的影响

摘要

针对城市二维道路交通网络十字交叉路口在红绿灯控制下行驶的车道问题,提出一种四向交通道路模型,其中包括考虑加速度、换道概率参数对交通流的影响.采用元胞自动机模型(BML模型)模拟车辆运行的动态过程,给出换道概率临界点位置对车流量影响之间的关系.数值结果表明,换道概率对整个进、出口车流量产生扰动影响,换道规则符合车辆运行状态.%Aiming at the lane problem in the cross intersection of two-dimensional traffic network with traffic lights, this paper puts forward a four-direction traffic model, and it includes the impact of acceleration parameters and change lanes probability on traffic flow, takes advantage of the methods of cellular automaton of BML model so as to simulate the whole dynamic process of vehicle, and points out the relationship between the critical point of lane changing probability and traffic flow influence. Numerical results show that the probability of lane change has disturbance impact on input and output traffic flow, and lane changing rules are correspond to the basic line of vehicles running.