This sign means: Question This sign means: Answers The highway ahead curves only to the right. The highway ahead turns sharply to the right. The highway ahead curves to the right and then to the left. The highway ahead curves to the left and then to the right. Explanation Warning signs are used to warn drivers about upcoming hazardous conditions and are usually yellow with black markings. This sign warns drivers that the road ahead curves to the right and then to the left. This questions appears in the following tests: Wisconsin Motorcycle Practice Test 6 Wisconsin Motorcycle Practice Test 8