United States Permit Test Coach
Sign shapes and colorsQuestion 6 of 223

What does the color red mean on a traffic sign?

  1. Warning of a hazard
  2. Services for drivers
  3. Temporary traffic control
  4. Stop or prohibition
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Correct answer: Stop or prohibition

Red means stop or prohibition. STOP signs and no-turn signs use red for this reason.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 1D.05 Color Code, page 74

Practice sign shapes and colors

Questions last reviewed: 18 October 2026