Question This sign tells you that: Answers No turns are allowed on the road. The road narrows ahead. There is a series of curves ahead. Explanation Warning signs are usually yellow with black markings. They alert you to conditions that are immediately ahead. This sign warns drivers about an upcoming winding road. Take a FREE Practice Test Now This questions appears in the following tests: California Practice Test Mississippi Practice Test Alabama Practice Test Wisconsin Practice Test Delaware Practice Test South Dakota Practice Test Arkansas Practice Test Tennessee Practice Test Georgia Practice Test Kentucky Practice Test Illinois Practice Test Iowa Practice Test Wyoming Practice Test Maryland Practice Test District Of Columbia Practice Test Kansas Practice Test Nebraska Practice Test Connecticut Practice Test Maine Practice Test Arizona Practice Test