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. Pass your DMV Written Test with flying colors Take me to the cheat sheet Pennsylvania This questions appears in the following tests: Alaska Practice Test 5 Colorado Practice Test 8 District Of Columbia Practice Test 2 Florida Practice Test 8 Hawaii Practice Test 21 Idaho Practice Test 1 Idaho Practice Test 31 Indiana Practice Test 11 Indiana Practice Test 36 Iowa Practice Test 31 Louisiana Practice Test 2 Louisiana Practice Test 36 Maine Practice Test 12 Massachusetts Practice Test 4 Michigan Practice Test 34 Michigan Practice Test 41 Minnesota Practice Test 1 Missouri Practice Test 12 Montana Practice Test 27 Montana Practice Test 14 Nebraska Practice Test 15 Nevada Practice Test 6 New Hampshire Practice Test 9 New Jersey Practice Test 23 New Jersey Practice Test 34 North Carolina Practice Test 36 North Carolina Practice Test 12 North Dakota Practice Test 12 Ohio Practice Test 13 Ohio Practice Test 7 Oregon Practice Test 8 Pennsylvania Practice Test 1 Pennsylvania Practice Test 14 Rhode Island Practice Test 2 South Carolina Practice Test 29 Texas Practice Test 26 Utah Practice Test 12 Virginia Practice Test 10 Washington Practice Test 7 West Virginia Practice Test 8 Wisconsin Practice Test 3