National Transportation Atlas Database (NTAD): Household Size by Vehicles Available 2021-Present Datasets

The Household Size by Vehicles Available 2021-Present dataset was compiled by the Bureau of Transportation Statistics (BTS) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The Household Size by Vehicles Available table from the 2021 American Community Survey (ACS) (5-year estimates) was joined by 2020 tract-level shapefiles for all 50 States, District of Columbia and Puerto Rico provided by the Census Bureau. A new file was created that combines the demographic variables from the former with the cartographic boundaries of the latter. The demographic variables contain count estimates for number of vehicles per person, by Census tract, and the geospatial file allows these values to be visualized on a map. Percentage values for the count estimates were calculated and added, with households of a specific size as the denominator.