Two Waymo driverless taxis stop and face each other on a street in San Francisco before driving past each other, on Feb. 15, 2023. Cruise, a subsidiary of General Motors, and Waymo, a spinoff from Google, both are on the verge of operating 24-hour services that would transport passengers throughout one of the most densely populated U.S. cities in vehicles that will have no one sitting in the driver’s seat. AP photo