Senor Mexicano
idk
The only way I'd like to see driveable cars added is if they were restricted to a certain minigame. Even then, I feel like they really wouldn't fit with the aesthetics of Animal Crossing.
urm, that would be a big leap!!
as people have suggested above, i think bikes/bicycles and scooters would be more suitable + it would be cuter riding around on your town - imagine knocking over all your villagers in a big car