I can’t remember who told me they were writing some ArcGIS code to estimate what the Census Bureau’s new urbanized (50,000+) areas might be, based on the CB’s Federal Register notice of the final criteria. If you are willing to share your code, I think that there are others who would be interested in applying it in their own area.
I checked with the Census Bureau Geography and they said they were NOT going to share their code.
FHWA decided NOT to attempt this task, as we will just WAIT for the list and boundaries to be released from the Census Bureau.
FHWA Office of Planning
206-220-4460 (in Seattle)