Waymo's self-driving car fleet clips 4-million mile mark, set to kick off self-driving taxi service

Four million miles down, unlimited potential to go. Waymo's fleet of self-driving cars has officially reached the four-million-mile mark in about eight years of total operation. And in the coming months, the company will launch a self-driving taxi service in Phoenix, Arizona, for the public to use. The pace of those self-driving miles has...