United States Permit Test Coach
Work zonesQuestion 169 of 223
Orange diamond sign with the black words DETOUR AHEAD

What does this sign tell you?

  1. You must stop and wait for a flagger
  2. The road ahead has a hard curve
  3. Only trucks may use this road
  4. The normal road is blocked and you must use another route
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Correct answer: The normal road is blocked and you must use another route

A detour sends you on a different road or route around the work. Follow the detour signs until you return to your road.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 6H.04 DETOUR Sign (W20-2), page 843

Practice work zones

Questions last reviewed: 18 October 2026