Possibilities
I guess it's worthwhile to brainstorm concepts like this, we used to have sessions at work where people could throw out all kinds of outlandish ideas to solve a problem. Although many of these off-the-cuff suggestions were more laughable than practical, now and then the germ of an idea could develop into something real.
Like inductive charging -- with a large space between the terminals, that does present problems with efficiency and leakage. Consider though, perhaps the car's terminal plate could lower itself to become in virtual contact with the charging plate, greatly alleviating both problems. Or just techniques to shape and concentrate the magnetic field.
Is inductive-coupling efficient? That's what transformers are, and can be 99% efficient.
I'd be more worried about the mechanical issues, like getting your car positioned exactly right, the effects of snow, etc.
I think one thing some readers here lose sight of, when discussing issues like regenerative braking, solar charging, is the rather large amount of energy that must be transferred to the battery system. A lot of schemes seem doable at first blush, until you grind the numbers.
BTW, we already have ways of running electric vehicles along highways without batteries, generators, etc. They're called TROLLEYS! (Can't imagine personal cars going that route though, maybe I need to get back to that brainstorming session).
