Question This sign means: Answers No right turn. Keep right. No U-turn. Left lane must turn left. Explanation Regulation signs regulate traffic speed and movement, displaying rules which drivers must obey. This regulation sign means that right turns are prohibited. Take a FREE Practice Test Now This questions appears in the following tests: New Hampshire Practice Test Maine Practice Test Idaho Practice Test Washington Practice Test Michigan Practice Test Indiana Practice Test Louisiana Practice Test Ohio Practice Test Minnesota Practice Test Montana Practice Test Vermont Practice Test North Dakota Practice Test Virginia Practice Test Florida Practice Test Massachusetts Practice Test Nevada Practice Test Hawaii Practice Test Oklahoma Practice Test West Virginia Practice Test Wisconsin Practice Test Iowa Practice Test Utah Practice Test Oregon Practice Test Missouri Practice Test Alaska Practice Test New Mexico Practice Test North Carolina Practice Test New Jersey Practice Test Colorado Practice Test Texas Practice Test