Uber has expanded its partnership with Waymo to offer autonomous vehicle rides in Austin, Texas via the Uber app.Riders in Austin can request a Waymo robotaxi through the Uber app for selected trips at no additional cost.The Waymo autonomous vehicles are currently available in a 37 square mile area and there are plans to expand the service.Uber also confirmed that Waymo rides will soon be available in Atlanta, Georgia, exclusively through the Uber app.