考虑两次改变驾驶方式的双车道交通流元胞自动机模型

Two-Lane Traffic Cellular Automata Model Taking into Account Twice Changing of Driving Manners

考虑驾驶员在不同交通环境下会变换驾驶方式的真实情况,建立两次改变驾驶方式的双车道交通流元胞自动机模型(TTChange-CA模型).通过数值模拟发现,2种类型车辆的初始混合比例和换道概率对交通流基本没有影响;与只改变一次驾驶方式的双车道模型(TChange-CA模型)相比,TTChange-CA模型提高了系统的流量、速度和临界密度,增加了道路利用率;与双车道SDNaSch模型和WWH模型相比,该模型的速度、流量及时空图的致密程度介于二者之间,更真实地刻画了现实交通流.

Drivers tend to change their driving manners frequently.In this paper,a traffic cellular automata model for a two-lane highway,which takes into account such changes twice,referred to as TTChange-CA model,is proposed.Numerical results show that the original mixture proportion and lane changing probabilities of two kinds of vehicles have almost no influence on traffic flow.Compared with TChange-CA model of two-lane road,meaning that there is only one change of driving manners,the TTChange-CA model can increase the traffic flux,speed and the critical density.Therefore it can increase the road utilization rate.The traffic density,flux and compactness of the spatial-temporal diagram for TTChange-CA model are between the two-lane SDNaSch and WWH models,and can better describe the traffic flow.