We've moved beyond the geewhizOMG phase of autonomous cars and into the dirty, nasty, contentious world of legislation and regulation. The California DMV has issued its rules that Google (and others) have to abide by, and with that fight over, now we know what the crew from Mountain View wanted to hide.
Google's director of safety for its self-driving car program, Ron Medford, sent a letter to the DMV regarding the final regulatory text of the State's autonomous vehicle testing guidelines. In it, Medford took issue with several of the regulations, one of which was the rule that passenger cars shouldn't be the only vehicles allowed to test under the rules (see: motorcycles). But he also argued "to limit required reporting to accidents involving vehicles operated in autonomous mode."