Alphabet's Waymo is expanding its service in Austin, Texas, to 90 square miles from 37 square miles earlier, the software giant's self-driving unit said on Thursday, seeking to protect its top position in the city from rivals such as Tesla. Waymo, which has over 100 vehicles on the Uber platform in Austin, will now cover new neighborhoods such as Crestview, Windsor Park, Sunset Valley and Franklin Park, the company said. After cautiously expanding its self-driving taxi services across the U.S.