overhead traffic sign

例句：

1. 1.The overhead traffic sign is clearly marked to guide drivers.
   头顶交通标志清晰标出，指导司机。
2. 2.The construction of the overhead traffic sign has been completed.
   头顶交通标志的建造已经完成。
3. 3. The overhead traffic sign helps to reduce accidents on the road.
   头顶交通标志有助于减少道路上的事故。