Waymo One currently operates in San Francisco, Los Angeles, Silicon Valley and Phoenix, and is also driving in Austin and Atlanta.

Waymo on Tuesday added Washington D.C. 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 riderless ride around the nation’s capital city.

Waymo, the robotaxi business of Google parent Alphabet Inc., plans to launch service in Washington, DC, next year, a move that would effectively give US lawmakers and other officials more exposure to self-driving cars as they mull a framework for federal standards.