Question This sign means: Answers A left curve is ahead. A series of curves is ahead. An S-curve is ahead. The road will be slippery when wet. Explanation This sign warns that especially slippery conditions exist when the road is wet. Take a FREE Practice Test Now This questions appears in the following tests: Wisconsin Practice Test Rhode Island Practice Test North Carolina Practice Test New Jersey Practice Test Indiana Practice Test Washington Practice Test Oregon Practice Test North Dakota Practice Test Missouri Practice Test Iowa Practice Test Ohio Practice Test Minnesota Practice Test Michigan Practice Test Nevada Practice Test Idaho Practice Test Florida Practice Test Montana Practice Test Colorado Practice Test Pennsylvania Practice Test New Hampshire Practice Test Louisiana Practice Test New Mexico Practice Test Alaska Practice Test West Virginia Practice Test Texas Practice Test Vermont Practice Test Oklahoma Practice Test Massachusetts Practice Test Virginia Practice Test Utah Practice Test Hawaii Practice Test