The Associated Press / In this undated handout photo provided by Zoox, Zoox robotaxis are assembled at a 220,000-square-foot factory located in Hayward, California.

HAYWARD, Calif. — 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 robotaxi factory announced Wednesday heralds a new phase in Amazon’s push into a technological frontier that began taking shape in 2009, when Waymo was launched as a secret project within Google.

Amazon began eyeing the market five years ago when it shelled out $1.2 billion for self-driving startup Zoox, which will be the brand behind a robotaxi service that plans to begin transporting customers in Las Vegas late this year before expanding into San Francisco next year.

Zoox, conceived in 2014, will be trying to catch up to Waymo, which began operating robotaxis in Phoenix nearly five years ago. It started charging for rides in San Francisco in 2023 and also expanded into Los Angeles and Austin, Texas. Waymo says it has recorded more than 10 million paid rides while other would-be rivals such as Amazon and Tesla are still fine-tuning their self-driving technology and tackling how to ramp up their fleet.

Zoox’s manufacturing plant in Hayward, California spans across the equivalent of three-and-a-half football fields. It’s located about 17 miles north of a factory where Tesla makes some of the electric vehicles that Musk believes will eventually be able to operate without a driver behind the wheel.

Since moving into the former bus manufacturing factory in 2023, Zoox has transformed it into a high-tech facility where its boxy, gondola-like vehicles are put together and tested along a 21-station assembly line. For now, Zoox is only making one robotaxi per day, but by next year hopes to be churning out three vehicles per hour.

Once it gets the factory up to full speed with production spread over two eight-hour shifts, Zoox is aiming to make 10,000 robotaxis annually in Hayward for a fleet aimed at entering other major markets, including Miami, Los Angeles and Atlanta.

Although Zoox will be assembling its robotaxis in the U.S., about half of the parts are imported from outside the country, according to company officials. Waymo is also planning to expand into Atlanta and Miami and on Wednesday took the first step toward bringing its robotaxis to the most populous U.S. city with the disclosure of an application to begin testing its vehicles in New York.

“It’s an exciting time to be heading on this journey,” Zoox CEO Aicha Evans said during a Tuesday tour of the robotaxi factory that she co-hosted with Jesse Levinson, the company’s co-founder and chief technology officer.

Although Zoox will be lagging well behind, it believes it can lure passengers with vehicles that look more like carriages than cars, with seating for up to four passengers.