This sign indicates a: Question This sign indicates a: Answers Railroad crossing. Pedestrian crossing. No passing zone. Explanation Yellow signs with black markings are used to warn drivers about upcoming hazards or special conditions. Round signs are used only to warn about upcoming railroad crossings. This questions appears in the following tests: Alabama Motorcycle Practice Test 89 Arkansas Motorcycle Practice Test 3 California Motorcycle Practice Test 28 Delaware Motorcycle Practice Test 111 Georgia Motorcycle Practice Test 27 Idaho Motorcycle Practice Test 76 Illinois Motorcycle Practice Test 211 Kansas Motorcycle Practice Test 110 Nebraska Motorcycle Practice Test 55 Ohio Motorcycle Practice Test 37 South Carolina Motorcycle Practice Test 151 South Dakota Motorcycle Practice Test 16 Tennessee Motorcycle Practice Test 59 Virginia Motorcycle Practice Test 91 Wisconsin Motorcycle Practice Test 27 Wyoming Motorcycle Practice Test 139