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.

After years of delays, Tesla finally unveiled its Robotaxi concept in October last year on the Warner Bros. studio lot in Burbank, California. The demonstration wasn't going to show Tesla's concept Cybercab vehicle navigating real-world situations,

Driverless rideshare service Waymo, owned by Google parent Alphabet, deployed its fleet to New York City this week to begin mapping out the city roads – with humans still sitting behind the wheel while they await a change in state law to allow fully driverless riding.