I'd put a bus chassis on the bottom, and drive that baby around town! I can just me going down the 405, especially if the horn is included.
Mouse-o-rail 2.0. Anyone here remember the Mouse-o-rail from the 35th Anniv of Disneyland? The front car of Mark III Monorail Red was saved (thanks to Victor Korman) and Disney converted it into a street ready vehicle that toured the country for the 35th.