It's ONE car driven for how long? 140,000 miles in Nevada, probably on straight roads and mostly out in the desert highway. How many people do you know who have driven for years without incident, I know a lot, and luckily for me don't know anyone who has had a fatal car crash, maybe we should all get me to drive everyone around as I've been driving for 18 years and I'm still here! lol. The figure of fatal crashes is something like 1 for every million miles driven. So it's going to take along time for that single google car to reach the average fatal crash figure, and only then has it passed the "crazy human drivers" (yes I know not a very accurate statistical measurement). Add 1 million google cars and then we will see what happens.