In order to be registered as an RV, you must get rid of the school district signs, the stop sign, the swing arm, and the red and amber overhead flashers. The point of the flashers is to warn motorists that the bus is stopping, or is stopped, and to be aware that children are present. Some people remove them completely, and weld over the holes where the lenses used to be. I opted to re-purpose the lights into useful floods.

I ordered new clear lenses for the lights at something like $8 each, and rewired the system, removing the flasher relay in the process. Now, when I flip the switch that used to activate the flashers, it turns on my overhead lights. The front and back are on different switches. The video below does a decent job of explaining how the system works.