It's hard to say if we would even recognize what passes for a road if offered a glimpse of two generations from now, let alone a car.
A road could be a lot more "rail" like, and a car driven by an electric motor does not see the same benefits of engine off coasting that an internal combustion engine does. But if ICE's are part of the target, my guess is that it is a mid-term target at best, and would need a sufficient downgrade to maintain speed without any power, to reclaim maximum benefit (and certain states would have to repeal 80 year old anti coasting laws), roller coaster style
