California is already more accommodating to self-driving cars than many parts of the country, but it's taking that friendliness one step further today. The state DMV has modified its regulations to streamline the testing and use of fully autonomous cars (that is, ones that don't need anyone behind the wheel). Many of these are subtle but important changes. Car makers no longer need to notify local officials of the "operational design domain" of their machines, summarize all the instances when a car's autonomous driving disengages or certify that a car can't drive itself in commonly restricted conditions.