Re: However
"Until we get fully autonamous driving cars (like those you see in futuristic movies) these things should be nowhere near the public highways."
It may be necessary to have separate roadways for automated and human driven vehicles. PRT systems can be very efficient since they aren't competing with cross traffic, peds and bicycles. UltraGlobal (may be out of business now) had a concept where people could own their own car that can be driven "manually" and would still be compatible with an automated PRT system that takes over when entering a controlled roadway in a city center or along a major motorway.
It could be a long time before it's possible to have automated cars that can work in a mixed environment.
Biting the hand that feeds IT
