Question This sign means: Answers Slippery when wet. Stop sign ahead. No U-turn. Explanation All roads are slippery and dangerous when wet. This sign warns of conditions that can cause a driver to lose control of a car. A driver should slow down when coming upon wet pavement because it takes longer to stop. Take a FREE Practice Test Now This questions appears in the following tests: Delaware Practice Test South Dakota Practice Test Alabama Practice Test Nebraska Practice Test Ohio Practice Test California Practice Test South Carolina Practice Test