Its a great idea, if you would sit it in a casing of 4 feet thick concrete you would not have to worry about a fender bender.
It's kinda dangerous..I think that the nearest future is for the electric cars, esp. as they are already invented and tested. Windmills + e-cars = better ecology and its rather cheaper as well
With the Telsa and the recent release of the Volt and Leaf we already have nuclear powered cars or at least they are nuclear powered if the local grid has a nuclear reactor hooked to it. So about 40% are nuclear powered. Trucks can be nuclear powered if nuclear reactors need big space. Trains, Cargo ships and Passenger Ships can be nuclear powered if nuclear reactors need massive space. Can giant planes be nuclear powered also?
Nuclear powered car crash will release radiation only. The massive Japan nuclear reactor explosion did not kill anybody instantly. Nuclear cars are not bombs.