(FILES) This file photo taken on January 11, 2015 shows General Motors President Dan Ammann speaking on the eve of The North American International Auto Show in Detroit, Michigan. General Motors believes in autonomous vehicles as a safer mode of transport, and expects the technology to come more quickly than most people think, a top executive said July 11, 2016. "There isn't going to be a particular moment or day when we see it -- it will unfold in a gradual way, but it will be a lot faster than people are expecting," said GM president Dan Ammann at the Fortune Brainstorm Tech conference in Colorado. / AFP PHOTO / JEWEL SAMADJEWEL SAMAD/AFP/Getty Images
