各种交通灯信号指示车辆司机和行人，在十字路口及公路上所应规守的交通规则。

Traffic lights tell drivers and pedestrians what they must do at intersections and along roads.

youdao

各种交通灯信号指示车辆司机和行人，在十字路口及公路上所应规守的交通规则。

Traffic lights tell drivers and pedestrians what they must do at intersections and along roads.

youdao