We post updates on our blog or Twitter account from time to time. There isn't an explicit, public roadmap of "On this date, we will open in < CITY >", but we have announced LA [1] as our next city for Waymo One (the name of the ride hailing service):

> Los Angeles will be Waymo’s next ride-hailing city, joining Phoenix and San Francisco as we expand to more locations.

Beyond the official service, we also do testing in multiple locations. For example, we announced that returning to Austin for testing [2]. In that post, we mention other weather testing we've done in Miami, NYC, and Bellevue, WA.

Beyond ride hailing, we have separate testing for Waymo Via with our Class 8 trucks, that you might see in Arizona or Texas.

[1] https://blog.waymo.com/2022/10/next-stop-for-waymo-one-los-a...

[2] https://blog.waymo.com/2023/03/expanding-waymos-testing-to-A...