California moved into the self-driving lane this week. With Google's help, it passed a law that will allow computer-controlled cars on the road, at least on a test basis. Google has modified and tested a fleet of Toyota Prius hybrids that drive themselves using a range of video and radar technology. And that's just the beginning. By some estimates, self-driving vehicles will make up 70 percent of the nation's traffic by the year 2040. Proponents of driverless cars say their widespread use would reduce congestion and give elderly and impaired drivers new freedom. Others worry about safety, liability and privacy issues. Guest host, Tom Gjelten, and his guests discuss the future of driving.