United States Permit Test Coach
Railroad crossingsQuestion 207 of 223
Yellow diamond with a black low vehicle shape on a hump in the road

What does this sign warn you about?

  1. A crossing that has no gates
  2. A crossing with a low bridge over it
  3. A crossing that trains do not use
  4. A dip or hump that may trap a long or low vehicle
Show answer

Correct answer: A dip or hump that may trap a long or low vehicle

A low ground clearance sign warns of an abrupt rise at the crossing. Long vehicles and trailers with low ground clearance can hang up on the tracks.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 8B.16 Low Ground Clearance Grade Crossing Sign (W10-5), page 1046

Practice railroad crossings

Questions last reviewed: 18 October 2026