[brc]

Maybe the driver does add a significant cost from your example. I suspect this varies from city to city, as some cities have strict driver requirements (ie, London) while some others seem to just employ anyone with a pulse.

Another cost the car2go scheme is missing is the taxi licensing scheme, which most local governments use as a cash-cow by restricting supply and charging high recurring fees.

Add the fact that most robotic-trips are not going to be two-way and you're probably getting closer to $10 dollars for that trip, which, undoubtedly is still cheaper than with 'wetware' behind the wheel - but some people seem to be thinking this would be as cheap as mass transit, which to me is just wishful thinking.