Nvidia last week began test-driving autonomous cars on California roads, after the state’s Department of Motor Vehicles gave it the green light. The company is testing its Drive PX2 autonomous driving platform, said Rob Enderle, principal analyst at the Enderle Group. Nvidia recently has made several well publicized moves in the autonomous car arena. It forged a partnership with Baidu this summer to build a cloud-to-car platform for semiautonomous cars.