The vehicles, which will have no back-up drivers behind the wheel to take over in sticky situations, will serve an area of 50 square miles.
Before the coronavirus struck, which reduced demand for rides, Waymo was providing 1,000 to 2,000 rides in autonomous vehicles per week.
Waymo did not disclose how many fully autonomous vehicles will be available to the public in the Phoenix area.
“Even small experiments with fully autonomous vehicles in the real world are important steps forward,” said Erik Gordon, a professor at the University of Michigan Ross School of Business, in an email.
After that, Waymo will re-introduce human backup drivers behind the wheel in some of the vehicles so the company can work on expanding its service area.