The Ars Technica article says this is still the case: > To aid with navigation, Waymo has built high-resolution three-dimensional maps of its service area. Sel

The Ars Technica article says this is still the case: > To aid with navigation, Waymo has built high-resolution three-dimensional maps of its service area. Self-driving software in each car can compare the objects identified by sensors to objects on the map, allowing it to quickly distinguish stationary objects like trees and buildings from mobile objects like cars and pedestrians. > As Waymo expands its map and acquires more vehicles, it will also expand its service area. Before too long, Waymo expects to offer service across the entire Phoenix metropolitan area. Eventually, Waymo will extend service to other metropolitan areas using the same incremental approach. https://arstechnica.com/cars/2017/11/fully-driverless-cars-are-here/ https://arstechnica.com/cars/2017/11/fully-driverless-cars-a...