+1, but all this to save the energy it takes to flip a switch???
Any of you guys know how magnetic levitation trains (MAGLEV) work? You know the high speed trains like the French and Germans have? Oh wait, here in the US that might as well be a back to the future type alternate reality.
The budget cutters cut high speed rail electing to curse the US to be left behind in the dust...
Jokes aside, my point is its not such a leap of imagination to see this working quite easily. Only issue I see is just like the MAGLEV with its rails, you need specialized or dedicated road infrastructure. But even worse, the sheer reach that a car requires would mean maybe only in a city for city only cars, otherwise I see no practical economical way to do this. IMO.