The fast expansion of Waymo’s driverless car service is growing competition for Uber. The companies are also partners.

Uber is opening its "interest list" for riders in Austin, Texas, who want to try the Waymo robotaxi service there soon. Riders in Austin will be able to travel across 37 square miles of the city when Uber and Waymo fully launch the service.

With the Uber and Waymo robotaxi launch next month, users in Austin can sign up now for priority access to the new AVs.