Traffic Analysis Zones Cartographic Boundary Files Descriptions and Metadata

Cartographic Boundary Files

Traffic Analysis Zones
Cartographic Boundary Files Descriptions and Metadata
Geographic Area Descriptions | Metadata

Boundary File Titles

2000 Traffic Analysis Zones

Geographic Area Description

A traffic analysis zone (TAZ) is a special area delineated by state and/or local transportation officials for tabulating traffic-related data- especially journey-to-work and place-of-work statistics. A TAZ usually consists of one or more census blocks, block groups, or census tracts. For the 1990 census, TAZs were defined as part of the Census Transportation Planning Package (CTPP). The U.S. Census Bureau first provided data for TAZs in conjunction with the 1980 census, when it identified them as "traffic zones."

Each TAZ is identified by a six-character alphanumeric code that is unique within county or statistically equivalent entity. For the 1990 census, TAZ codes were unique within CTPP area, which generally conformed to a metropolitan area.
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Metadata

Title 2000 Traffic Analysis Zones

Location http://www.census.gov/geo/www/cob/tz2000.html

Geography 47 States, D.C.

Vintage January 1, 2000

Formats ARC/INFO Export (.e00), Arcview Shapefile, and ARC/INFO Ungenerate (ASCII)

Projection Geographic (Lat/Lon)

Datum NAD83

Distributor Department of Commerce, Census Bureau, Geography Division

Originator Department of Commerce, Census Bureau, Geography Division

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