Yes there are a lot of corner cases that I didn't belabor in my post. Most of the very heavy vehicles you mention are in fact already diesel electric. ie a di

Yes there are a lot of corner cases that I didn't belabor in my post. Most of the very heavy vehicles you mention are in fact already diesel electric. ie a diesel motor operates as a generator to provide electricity for the electric motor that moves things along. Just replace the diesel with a battery and you're there. (not as simple as it seems but right in theory) With small cars in a city core these cars rarely go faster than 40 mph and on average about 30mph with traffic lights so you don't need the separation that you would want on a freeway. Several vehicles like this are already available or under development. I suspect that a Smart Car would come very close to meeting this spec already.