I was listening to a guy who has been working on autonomous vehicles, he was saying fully autonomous vehicles are still a long way off.
Listening to him would have to agree, there are lots of situations where sometimes makeshift dirt roads etc.. must be used when roads are washed out or earthquake etc.. makes the regular road sometimes un-passable for months at a time (I have seen this on major freeways even in L.A.).
Then there is just weather, Fog, 3 inch’s of fresh snow etc.. other chaos and mayhem.
It may be quite a while yet, then there will still
a requirement for manual driven vehicles for a very long time.