The improved CA model can be used for simulating the urban road traffic flow of median speed.
改进后的CA模型，适用于对城市道路上中速车流运行状况的模拟。
Several faults in the improved NS model using two examples is pointed out and also another single lane traffic CA model by introducing vehicle_moving_status variable and feedback rule is proposed.
通过两种情况列出了改进的NS模型存在不尽周严的地方，随之在新模型中引入了行车状态变量和反馈规则，从而控制车辆出现倒车和刹车过急等现象。
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