So many comments here are in the form of "People won't trust autonomous vehicles." Well I'm people, and I trust them. And it's for one simple reason: Whatever bugs they have can be fixed for every autonomous car on the road at the same time. That just can't be said for human beings. Every one of us has to learn how to idle icy roads, fog and other hazards individually, with wildly varying results. A computer program does it once, and is constantly getting feedback from the millions of cars on the road all the time.
Sure, people want someone to blame for accidents. And people might not like the idea of cars without drivers, or worry about contrived "Does the car kill the driver or the pedestrian" situations. But at the end of the day, statistics is overwhelmingly on the side of driverless cars. Saying "Yes, but people aren't reasonable enough to see that" isn't helpful. The question is, how quickly can we get people to do what's best after the technology has been perfected?