铁路道口预告标志
MUTCD W10-1
前方有铁路道口,减速并准备停车。
标志外观
A round yellow disc, the only round warning sign, with a black X and the letters R R marking a railroad crossing ahead.
什么时候会见到
In advance of a railroad crossing on both highways and city streets, giving drivers time before they reach the tracks.
该怎么做
Slow down and be prepared to stop; look and listen for trains, and never start across unless you can clear the tracks completely.
相关标志
来源:《统一交通控制设施手册》(MUTCD)第 11 版 — 美国联邦公路管理局(FHWA)。