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: Wisconsin Practice Test Kansas Practice Test Alabama Practice Test Ohio Practice Test Delaware Practice Test Idaho Practice Test Nebraska Practice Test South Dakota Practice Test Tennessee Practice Test Virginia Practice Test