路口通行规则的元胞自动机模拟

Use of cellular automata to simulate passage rulesof intersection

目前采用的路口通行规则是，亮绿灯时处于对向的两条车道上的车辆可以同时通行．由于一条车道的直行车辆和另一条车道的左转车辆存在着冲突，交通效率被降低．在上海的一些交通要道已经实施了一种新的交通规则，即每条车道独立轮换通行．本文采用元胞自动机模型，对新老两种路口通行规则的效用进行了模拟研究．结果表明，当车速提高到一定值后，新的规则要优于老的规则．

At present, the passage rule of intersection is that care in each of two oppositeroads can go simultaneously during the green light period. It can clearly be seen, the cars go-ing ahead in one road conflict with those turning left in the other, making the traffic efficiencydrop down. There is a new rule executed in some main routes in Shanghai, that is each roadindependently attains the green light in turn. In the paper, the model of cellular automata isused to simulate the carrying out of these two rules. The results illustrate the new rule isbetter than the old one, when care run above a certain speed.