https://www.theverge.com/2018/1/12/16884064/waymo-self-driving-car-spotted-san-francisco

Publicly, Waymo, the self-driving unit of Google parent Alphabet, says the vast majority of its autonomous vehicle testing is taking place in five cities: Mountain View, California; Austin, Texas; Kirkland, Washington; Phoenix, Arizona; and most recently, Detroit, Michigan. But it would seem the company neglected to tell us about a crucial sixth city: its home base of San Francisco.

TechCrunch obtained pictures of a Waymo autonomous minivan on the fog-soaked streets of San Francisco, forcing the company to admit that it has returned to its city of origin, where it first began testing back in 2009. A Waymo spokesperson did not immediately respond to a request for comment.