Question This sign means: Answers No left turn. Flagger ahead. Two-way left turn. Turn right or go through. Explanation Regulation signs regulate traffic speed and movement, displaying rules which drivers must obey. This regulation sign means that left turns are prohibited. Take a FREE Practice Test Now This questions appears in the following tests: Idaho Practice Test Maine Practice Test West Virginia Practice Test Utah Practice Test Oregon Practice Test New Mexico Practice Test District Of Columbia Practice Test Louisiana Practice Test Massachusetts Practice Test Montana Practice Test Wisconsin Practice Test Virginia Practice Test Vermont Practice Test Ohio Practice Test New Jersey Practice Test Michigan Practice Test North Carolina Practice Test Texas Practice Test Colorado Practice Test Minnesota Practice Test Indiana Practice Test Nevada Practice Test Hawaii Practice Test New York Practice Test North Dakota Practice Test Rhode Island Practice Test Florida Practice Test Washington Practice Test Nebraska Practice Test Oklahoma Practice Test New Hampshire Practice Test Missouri Practice Test