Waymo already operates driverless services in Phoenix, San Francisco, Los Angeles and Austin, and has completed more than 10 million trips.

Just a few weeks after Waymo announced it was taking its robotaxi service to London in its first European expansion, the Alphabet-owned company has just revealed that it’s heading to three new cities in the U.S., too.

Waymo is starting to test autonomous vehicles in Detroit as it leads up to launching its ride-hailing service locally.