说明：  基于元胞自动机模型对于交通事故下的高速公路交通流仿真，在不同大小车比例和交通流条件下，输出交通冲突数，评价道路是否安全。
(Whether based on cellular automata model for highway traffic flow simulation in the accidents, the proportion of different sizes of vehicles and traffic flow conditions, the output number of traffic conflict,to evaluate of road safety.)