Apple recently updated its Maps app to add transit directions and data for Tucson, Arizona. Transit directions have been available in Phoenix, Arizona since October of 2017, but transit information for Tucson appears to be new.
Apple Maps users in Tucson can now select public transportation routes when getting directions between two locations, with SunTran bus lines available as a transit transportation option. Amtrak routes are also available, and have been for some time.
Apple has not yet added Tucson to the website where it lists locations where transit directions are available, but it should be added in the near future.
Transit directions were first [...]