This sign means: Question This sign means: Answers Railroad ahead. No passing zone. School zone. Explanation A round yellow sign indicates that there is a railroad crossing ahead. This questions appears in the following tests: Wisconsin Motorcycle Practice Test 40 Wisconsin Motorcycle Practice Test 29 Alabama Motorcycle Practice Test 101 Arkansas Motorcycle Practice Test 37 California Motorcycle Practice Test 3 Delaware Motorcycle Practice Test 66 Georgia Motorcycle Practice Test 114 Idaho Motorcycle Practice Test 87 Illinois Motorcycle Practice Test 35 Kansas Motorcycle Practice Test 62 Nebraska Motorcycle Practice Test 69 Ohio Motorcycle Practice Test 111 South Carolina Motorcycle Practice Test 195 South Dakota Motorcycle Practice Test 65 Tennessee Motorcycle Practice Test 106 Virginia Motorcycle Practice Test 110 Wisconsin Motorcycle Practice Test 158 Wyoming Motorcycle Practice Test 96