Teenagers in Phoenix, Arizona can now hail fully autonomous Waymo rides without an adult present, thanks to a new pilot scheme from the Google-backed company. The initiative, officially launched this July,

Alphabet's Waymo robotaxis have driven more than 100 million miles without a human behind the wheel, doubling the mileage in about six months, a top company official said, as it speeds up deployment in U.

Waymo and Tesla ramp up robotaxi efforts, signaling a major shift in urban mobility and the future of autonomous transportation.