A profile includes four tables that provide various demographic, social, economic, and housing characteristics for the states, counties, minor civil divisions in selected states, places, metropolitan areas, and congressional districts. It includes 100 percent and sample data from the decennial censuses. Some of the variables reported include household income, vehicles available in households, average travel time, Means of transportation to work.
Summary File 3 (SF 3) will be available from the Census Bureau beginning in June 2002. SF 3 contains small-area data from Census 2000 on subjects such as commuting, income, occupation, housing, and auto ownership.
SF1 contains the 100-percent data, which is the information compiled from the questions asked of all people and about every housing unit. Most of the SF1 data is reported at the Census Block level. Since the Transportation Analysis Zones defined in TIGER/Line 2000 are aggregations of Census Blocks, transportation planning agencies can assemble SF1 data for their TAZs.
Small area (Census block) population counts by race and national origin are now available from the Census Bureau. These files are known as "Redistricting data" or the "PL-94-171 data". The files are based on 100 percent count and contain the most detailed information on the location of the total population by race and Hispanic/Latino origin, and population over the age of 18 (voting population) by race and Hispanic/Latino origin.
The PL-94-171 data constitute an important source for recent transportation planning concerns such as Environmental Justice (EJ) analysis because of the detailed race and ethnicity variables on the file. The file contains extensive data on race and ethnicity, so it can be used to analyze the concentrations of minority population groups.
The 2000 Urban Area boundaries can be examined using the UA Census 2000 TIGER/Line files.