The operational layer controls also variable speed signs, lane closing symbols and variable message signs.

业务层还控制着可变速度标识，车道结束标志和许多可变信息标志。

youdao

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。

youdao

By using the method of quasi-sliding mode, the variable structure control law for lane keeping was designed.

采用准滑模控制方法，设计车道保持变结构控制规律；

youdao

Electronic signs will also be mounted on verges and gantries displaying variable mandatory speed limits and information to warn motorists about incidents, lane closures or conditions ahead.

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