[CTPP] 1980 Place-to-Place Flows (was: 1980 County-to-County Worker Flows)

Laura: Yes, the 1980 data on place-to-place (city-to-city) commuting is available from the 1980 UTPP. I'm looking at the 4/26/83 version of the "Part 6 Data Dictionary" and the variables SUMLEV and SUMLEVW represent the summary levels for residence area to work area. SUMLEV=44 is for SMSA-STATE-COUNTY-PLACE; and SUMLEVW=44 is for SMSA-STATE-COUNTY-PLACE of WORK. In response to Joe Barbeau's (Central Connecticut RPA) question: Yes, 1980 UTPP data has MCD to MCD flows (SUMLEV=43 and SUMLEVW=43). On the other hand, it does NOT have county subdivision (COUSUB in census-speak) summary levels. In terms of 1970 data on place-to-place commuter flows, I am very certain it does *not* exist unless you or your predecessors did the computations and saved the data from over 30 years ago. My agency, for example, only has the 1970 commuter flow on zone-to-zone (our very old zone system) basis, by means of transportation. Our old zones don't aggregate very well to cities. One critical (and available in libraries) reference to the 1980 UTPP is the Transportation Research Record #981, which includes an Appendix "D" on "Areas Covered by the UTPP and Contacts" as of 12/1/84. Laurie: since Prince William County is in the Metro Wash COG region, you can probably contact the census guy at MWCOG (Bob Griffiths?), or check with Nanda Srinivasan at FHWA. Joe: Lucky for you, Connecticut purchased a statewide 1980 UTPP data file. The Connecticut DOT contact was Mr. Joseph Spragg as of 12/1/84, so chances are the contacts for the state have changed. With even better luck, the DOT will have saved the 1980 UTPP data and downloaded it from 6250 bpi density mainframe tapes to PC files. Again, check with Nanda to see if they have the 1980 UTPP tape for Connecticut. I know that Nanda has been working - in his spare time - on assembling/archiving old (pre-1990) census journey-to-work data files. Unfortunately, the Census Bureau never archived (i.e., kept their own copy) the 1980 UTPP tapes that they produced in 1983-1985. Chuck Purvis, MTC **************************** Does anyone know if this historical data (I'm interested in 1970 and 1980) is tabulated according to the place of work? That is, I want to find out where all workers in a given jurisdiction are commuting from. I'd even be satisfied to know the percentage of workers that are coming from outside of a given jurisdiction. The data available at the link below is fantastic, but as far as I can tell, it is only available according to place of residence. Thank you for any help you can give me. Laurie Gill Demographer Prince William County, VA