Google's self-driving car had already logged hundreds of thousands of miles on Bay Area roads before Gov. Jerry Brown took a ceremonious spin in an autonomous Prius last year and signed a law allowing the vehicles to operate in California.

Now bureaucrats in state government are playing catch-up, writing a whole new set of rules of the road.

Should a blind man be allowed to operate a self-driving car? Will an 8-year-old be permitted to "drive" herself to school? Should the vehicles roll through all kinds of weather? Who will be at fault when a robotic car crashes?