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 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.

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.