Tesla's robotaxi service in Austin significantly trails Waymo, deploying an estimated 30 cars with safety drivers, vs. Waymo's 200 cars without human monitors (Jack Ewing/New York Times)

Jack Ewing / New York Times:
Tesla's robotaxi service in Austin significantly trails Waymo, deploying an estimated 30 cars with safety drivers, vs. Waymo's 200 cars without human monitors  —  Shares of Tesla have hit new highs on optimism about the company's self-driving taxis.  But experts say Tesla is far behind Waymo, which has a big head start.