Google announced on Tuesday that its fleet of self-driving cars has logged 300,000 miles of test driving. At any given time, there are about a dozen computer-controlled Google Toyota Priuses (and now Lexus RX450h’s) on the roads of Nevada, Florida, Washington, D.C., and California, a Google spokesman told Talking Points Memo. Until recently, the vehicles contained two Google employees each, but the company will now allow people to ride solo and even use them to commute to work. “For now, our team members will remain in the driver’s seats and will take back control if needed,” Google’s wrote in a blog post. For now! But how soon until Google employees are permitted to maximize productivity by napping in the backseat, leaving San Francisco’s motorists to be constantly terrorized by the sight of a car rolling along with no humanoid at the wheel?