There would probably be different standards for cars that you own vs. the equivalent of a cab or an Uber/Lyft type deal. I'd think the main fear wouldn't be tha

There would probably be different standards for cars that you own vs. the equivalent of a cab or an Uber/Lyft type deal. I'd think the main fear wouldn't be that the car itself was unsafe to travel in (if they reach the point of becoming mainstream transportation), but that a car under someone else's control could be used nefariously. So I'd guess you'd want a fairly robust tracking/accountability system.