Notes & News
CTPP Data Products
Internet Mailing List
TAZUP / WORKUP
Old Data (pre-2000)
PUMS & PUMAs
|Welcome to our web
site. We hope you find this site fun, informative and above all useful.
We are organized under the Committee
on Urban Transportation Data and Information Systems of the Transportation
Research Board. We are very interested in census data matters as they relate
to transportation planning. As a result, our focus spans the entire spectrum
of census related activities including applied uses of the data, the content
of censuses, collection procedures and dissemination programs all within
the context of past, present and future censuses. This site was developed
to help provide a forum for those with an interest in transportation planning
and census data.
PUMS, PUMA = Public Use Microdata Sample, Public Use Microdata Area. The Census Bureau's PUMS program provides individual census records, or microdata, though at fairly large geographic areas. There is a 5-percent PUMS file, based on 5-percent of all census responses, at the regular PUMA level (designated areas of 100,000+ population); and a 1-percent "national" PUMS file, based on 1-percent of all census responses, at the "super PUMA" level (designated areas of 400,000+ population).
ACS = American Community Survey The Census Bureau's American Community Survey program is intended as the replacement for the standard decennial census long form. This "continuous measurement" program is projected to begin full-scale implementation in January 2003. Large area (65,000+ population) data will be provided annually through the ACS program. Small area (census tract) data are based on an accumulation of five years of ACS data.