I don't understand why they won't legalize 4 wheelers for the highway. It would save gas and some of the newest cars on the road aren't any bigger. They would just have to regulate them like they do motorcycles.
Other than an image problem (i.e. the redneck hillbilly) I can see no other reason not to legalize them. An awful lot of people around here already have them - once you get out of Charleston anyway.