According to http://www.taxifarefinder.com/main.php?city=SF&from=San+Francisco+International+Airport+(SFO)&to=Sunnyvale%2C+CA http://www.taxifarefinder.com/main

According to http://www.taxifarefinder.com/main.php?city=SF&from=San+Francisco+International+Airport+(SFO)&to=Sunnyvale%2C+CA http://www.taxifarefinder.com/main.php?city=SF&from=San+Fran..., 34 min taxi ride will cost you $104.95. An hour of driving a taxi would cost you at least $150. There's maybe $10 of non-human cost (car usage deprecation, fuel, insurance). ZipCar, for example, is less than $10/hr and cheap car rental is $40/day. Self-driving taxis, due to higher utilization and less management over-head, should be cheaper than car rental and more convenient for people. So we're talking about at least 10x rate reduction for auto-taxis than current taxis which will change behavior in a big way (lower prices will lead to higher usage which leads to higher profits). Ultimately the economics of self-driving taxi-like service should be: it's cheaper than total cost of ownership of owning your own car, even if you use it frequently (~2hrs a day).