Question Round signs indicate: Answers No passing zones. School zones. Upcoming railroad crossings. Hospitals. Explanation Round signs warn drivers of an upcoming railroad crossing area. Drivers should use extra caution when approaching a railroad crossing. Take a FREE Practice Test Now This questions appears in the following tests: Florida Practice Test New Jersey Practice Test Vermont Practice Test Utah Practice Test Idaho Practice Test North Dakota Practice Test Hawaii Practice Test Oregon Practice Test Iowa Practice Test Texas Practice Test Nevada Practice Test Missouri Practice Test Michigan Practice Test Nebraska Practice Test Louisiana Practice Test New Hampshire Practice Test Indiana Practice Test North Carolina Practice Test District Of Columbia Practice Test Montana Practice Test Virginia Practice Test Minnesota Practice Test Washington Practice Test Massachusetts Practice Test Maine Practice Test Alaska Practice Test West Virginia Practice Test Wisconsin Practice Test