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. Pass your DMV Written Test with flying colors Take me to the cheat sheet District Of Columbia This questions appears in the following tests: Alabama Practice Test 40 Alabama Practice Test 3 Arizona Practice Test 26 Arkansas Practice Test 4 California Practice Test 18 Connecticut Practice Test 5 Delaware Practice Test 21 Delaware Practice Test 26 District Of Columbia Practice Test 21 District Of Columbia Practice Test 22 Georgia Practice Test 26 Georgia Practice Test 20 Illinois Practice Test 35 Illinois Practice Test 21 Kansas Practice Test 1 Kansas Practice Test 3 Kentucky Practice Test 29 Kentucky Practice Test 3 Maryland Practice Test 16 Mississippi Practice Test 16 New Mexico Practice Test 19 Rhode Island Practice Test 15 South Carolina Practice Test 26 South Dakota Practice Test 2 Tennessee Practice Test 7 Wisconsin Practice Test 10 Wyoming Practice Test 47 Wyoming Practice Test 2