Through mixing different proportions of freight vehicles into traffic flow the CA Model simulated the traffic conditions under various conditions analyzed the relationship among freight vehicles and several indexes representing safety state such as the running speed lane change rate as well as accident rate .

通过向交通流中混入不同比例的 货运车辆，模拟了各种比例下的交通流运行状况，分析了货运车辆与平均速度、换道 率、事故率等指标之间的关系。