Gunn crossing sign

例句：

1. 1.The Gunn crossing sign is located at the intersection of two roads.
   门架交叉标志位于两条道路的交叉口。
2. 2. The Gunn crossing sign helps to indicate the direction of traffic flow.
   门架交叉标志有助于指示交通流向。
3. 3.The Gunn crossing sign was designed to prevent accidents caused by vehicles.
   门架交叉标志被设计用来防止车辆引发的事故。