United States Permit Test Coach
Warning signsQuestion 54 of 223
Yellow diamond with a black car and two wavy lines behind it

What does this sign warn of?

  1. A road surface that is rough
  2. A road with loose gravel
  3. A road surface that may be slippery
  4. A road that may flood
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Correct answer: A road surface that may be slippery

A Slippery When Wet sign shows a vehicle with skid marks. Slow down, and do not brake or turn hard when the road is wet.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 2C.30 Surface Condition Signs (W8-5, W8-7, W8-8, W8-11, W8-13, and W8-14), page 216

Practice warning signs

Questions last reviewed: 18 October 2026