Question This sign means: Answers No U-turn. Traffic signal ahead. Railroad ahead. Explanation This sign indicates that U-turns are prohibited. Take a FREE Practice Test Now This questions appears in the following tests: Alabama Practice Test Kansas Practice Test Oklahoma Practice Test Nebraska Practice Test Wyoming Practice Test Iowa Practice Test Arizona Practice Test Illinois Practice Test Arkansas Practice Test California Practice Test Maryland Practice Test Kentucky Practice Test Georgia Practice Test Delaware Practice Test South Dakota Practice Test Tennessee Practice Test Rhode Island Practice Test Connecticut Practice Test Wisconsin Practice Test New Mexico Practice Test Maine Practice Test Mississippi Practice Test