The one major problem that I see with these things is that people are already crappy drivers. Take away their need to drive 99% of the time, and they'll get 100% worse. Then, you've got REALLY HORRIBLE drivers that only have to drive the car under unusual (probably emergency) circumstances. Folks will get more and more distracted from driving and probably even sleep while driving, which is bad in case the car NEEDS human intervention.
Lets give folks even more excuses to claim less personal responsibility.
This is one of those things that'll probably work really well when it's working right, and be a catastrophe when it goes bad.
Another thing that will have to be figured in, is response to odd situations, ice (this on is probably easy), accidents, blow outs, etc....
It's a nice idea, and it may enhance the quality of life (or, at least, appear to), but I am not convinced that it'll make the world a better place.
Idiocracy here we come
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa

SOLD 2004 - gone but not forgotten