On the road to autonomy

General Motors Co. is adding cars to the race to get self-driving vehicles onto public roads. GM will expand its fleet of autonomous Chevrolet Bolts to 180 of the electric vehicles. The latest 130 cars, one of which is shown above, will be equipped with cameras, sensors and other hardware updated from the systems used on 50 self-driving Bolts being tested in San Francisco, Detroit and Scottsdale, Ariz.