One of the things that makes California unique in the world of self-driving car development is that it requires developers to submit something called a disengagement report every year.
This disengagement report -- not to be confused with DC's excellent The Dismemberment Plan -- is a detailed log of every instance where a human safety driver was forced to take control of a self-driving car during testing on public roads and the situation that caused it. It's one of the best metrics that the public has of just how advanced a given company's autonomous car program is.
