下坡标志
MUTCD W7-1
前方有陡下坡,控制车速。
标志外观
A yellow diamond warning sign with a black symbol of a truck on a downward slope to indicate a steep downgrade ahead.
什么时候会见到
It appears at the top of a steep hill or long descent, common on mountain highways and roads with sharp elevation drops.
该怎么做
Control your speed on the downgrade, shift to a lower gear if needed, and avoid riding your brakes.
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)。