Question Fluorescent yellow-green signs indicate: Answers School zones. Hospitals. Speed limits. Railroad crossings. Explanation Fluorescent yellow-green is used as the background color for pedestrian, bicycle, and school warning signs. Use extra caution when driving around these signs. Pass your DMV Written Test with flying colors Take me to the cheat sheet North Dakota This questions appears in the following tests: North Dakota Practice Test 5 North Dakota Practice Test 4