C'mon man! Google allows one to check on their promises and their progress. For example, from 2012:
http://www.computerworld.com/article/2491635/vertical-it/sel...
"Such "autonomous vehicles" will be a reality for "ordinary people" in less than five years, Google co-founder Sergey Brin said Tuesday."
How's that working out for you Sergey?
Self driving tech hasn't moved appreciably since the 90s. Computers are better. More people are trying it. Reality is, it's just collision avoidance with GPS. They rely on maps; what happens when the maps change? What happens when a kid runs out in front of one of these things?