https://www.cnbc.com/2017/09/06/us-to-unveil-revised-self-driving-car-guidelines-sources.html >President Donald Trump's administration is set to unveil revised self-driving vehicle guidelines next week in Michigan, responding to automakers' calls for elimination of legal barriers to putting autonomous vehicles on the road, sources briefed on the matter said on Tuesday. >U.S. Transportation Secretary Elaine Chao was expected to unveil the revised guidelines next Tuesday at a self-driving vehicle testing facility in Ann Arbor, Michigan, four people briefed on the matter said.