Waymo on Tuesday added Washington to its pioneering robotaxi service's steadily expanding list of U.S. markets, although passengers will have to wait until next year until they can take a driverless ride around the nation's capital city.

Waymo currently operates in San Francisco, Phoenix, Los Angeles, and Austin, and is headed to Atlanta and Miami this year.

Alphabet's self-driving unit Waymo said on Tuesday it aims to launch its fully autonomous ride-hailing service in the U.S. capital city next year.