A driverless car is displayed during a Google event in San Francisco in 2016. The Trump administration rolled out new non-binding guidelines Wednesday for regulating driverless cars and trucks -- its second move this week to advance a light-touch approach to tech regulation that contrasts with the strategy key European leaders are advocating. Transportation Secretary Elaine Chao used the big CES technology conference in Las Vegas to announce the driverless-vehicle guidelines, which her department developed in conjunction with the White House. They come just two days after the White House issued a broader set of draft principles for federal agencies' treatment of artificial intelligence, which President Donald Trump's advisers say should avoid "preemptive, burdensome or duplicative rules." The twin moves came during a week when three Cabinet secretaries and Trump's daughter Ivanka were scheduled to make appearances at the CES conference.