Amazon is gearing up to make as many as 10,000 robotaxis annually at a sprawling plant near Silicon Valley as it prepares to challenge self-driving cab leader Waymo. Tesla CEO Elon Musk is also vying to join the autonomous race.

The 220,000-square-foot factory is located in Hayward, California near its Foster City headquarters. This is Zoox’s second production facility in the Bay Area, adding to the assembly warehouse in nearby Fremont.

The self-driving tech company has begun building its small, custom-designed vehicles at a new Bay Area factory ahead of its commercial ride-service launch in Las Vegas this year.