It is illegal to ride or operate a minibike, dirt bike, or All Terrain Vehicle (ATV) on the District’s streets or sidewalks. It is okay to ride bicycles, mopeds, motorized bicycles, Segways, and motorcycles on the street, but not on city sidewalks.(They add that you can ride Segways and regular bikes on sidewalks outside downtown)
MPD has a couple flyers about what's legal and what's not on their minibike website, with one saying "Don’t jive and ride an illegal ride. Abide by the
law knowing what you can or can not ride!" Quite the tongue-twister.