Waymo isn't that specific. Google/Waymo's first steering-wheel-free prototype car was the Google Firefly, a bubbly little two-seater that hit public roads in 2015.

Zoox, a self-driving car company owned by Amazon, is deploying robot taxis without steering wheels, driver seats or drivers. But like all other self-driving cars, they still need help from humans.

At his ‘We, Robot’ event held at Warner Bros. Studios in Burbank, California, Musk, who also owns social network X/Twitter, showed off a silver-chrome hued Robotaxi, which has no steering ...