Waymo, the robotaxi firm owned by Google parent company Alphabet, has officially launched driverless taxis in Texas, with the help of Uber.Users in Austin can now access driverless Waymo robotaxis through the Uber app at no additional cost.Riders can choose between driverless Waymo robotaxis and non-self-driving vehicles when requesting rides.The service area currently covers 37 square miles in Austin and Waymo and Uber are planning to expand the service to Atlanta, Georgia next.