I don't think it will happen ever and I don't even think it should happen ever. The first step in making this possible would probably be standardization of all

I don't think it will happen ever and I don't even think it should happen ever. The first step in making this possible would probably be standardization of all road infrastructure everywhere. That will never happen so instead I think we should abandon our car centric society and start building trains. Something on a track is way easier to automate.