Question This sign means: Answers U-turns are prohibited. U-turns are permitted. Winding road ahead. Sharp left turn ahead. Explanation A regulatory sign displaying a red circle with a red slash through the middle indicates that a specific action is prohibited. U-turns are not permitted where this sign is posted. Take a FREE Practice Test Now This questions appears in the following tests: Oregon Practice Test Maine Practice Test Michigan Practice Test Ohio Practice Test Oklahoma Practice Test Utah Practice Test Minnesota Practice Test Wisconsin Practice Test Iowa Practice Test West Virginia Practice Test Colorado Practice Test Massachusetts Practice Test New Jersey Practice Test New Hampshire Practice Test District Of Columbia Practice Test