README for “National Transportation Analysis Regions (NTAR) 1995-2001” dataset. U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS) [distributor] 2025-05-29 ---------------------------------------------------------------- LINKS TO DATASET ---------------------------------------------------------------- A. Dataset archive link: https://doi.org/10.21949/1520803 ---------------------------------------------------------------- SUMMARY OF DATASET ---------------------------------------------------------------- The National Transportation Analysis Regions (NTAR) 1995-2001 dataset is from the Bureau of Transportation Statistics (BTS), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics's (BTS's) National Transportation Atlas Database (NTAD). National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand. ---------------------------------------------------------------- TABLE OF CONTENTS ---------------------------------------------------------------- A. General Information B. Sharing/Access & Policies Information C. Data and Related File Overview D. Methodological Information E. Data-Specific Information for: National Transportation Analysis Regions (NTAR) 1995-2001 [datasets] F. Update Log ---------------------------------------------------------------- A. GENERAL INFORMATION ---------------------------------------------------------------- 0. Title of Dataset: National Transportation Analysis Regions (NTAR) 1995-2001 [dataset] 1. Description of Dataset: The National Transportation Analysis Regions (NTAR) 1995-2001 dataset is from the Bureau of Transportation Statistics (BTS), and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics’ (BTS's) National Transportation Atlas Database (NTAD). National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand. 2. Dataset archive link: Https://doi.org/10.21949/1520803 3. Authorship Information: Principal Data Creator or Data Manager Contact Information Institution: U.S. Department of Transportation (DOT), Address: 1200 New Jersey Ave SE, Washington D.C. 20590 Contact: ntad@dot.gov Data Distributor Contact Information Name: National Transportation Atlas Database (NTAD) Institution: U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS), Office of Spatial Analysis and Visualization (OSAV) Address: 1200 New Jersey Ave. SE, Washington D.C. 20590 Email: ntad@dot.gov 4. Date of data collection and update interval: This dataset is not receiving updates. 5. Geographic location of data collection: United States of America 6. Information about funding sources that supported the collection of the data: Bureau of Transportation Statistics (BTS), Department of Transportation (DOT) ---------------------------------------------------------------- B. SHARING/ACCESS & POLICIES INFORMATION ---------------------------------------------------------------- 0. Recommended citation for the data: U.S. Department of Transportation, Bureau of Transportation Statistics (BTS). National Transportation Analysis Regions (NTAR) 1995-2001 [datasets]. Https://doi.org/10.21949/1520803 1. Licenses/restrictions placed on the data: These data are in the Public Domain. 2. Was data derived from another source?: No. 3.This document was created to meet the requirements enumerated in the U.S. Department of Transportation's 'Plan to Increase Public Access to the Results of Federally-Funded Scientific Research' Version 1.1 << https://doi.org/10.21949/1520559 >> and guidelines suggested by the DOT Public Access website << https://doi.org/10.21949/1503647 >>, in effect and current as of December 03, 2020. ---------------------------------------------------------------- C. DATA & RELATED FILE OVERVIEW ---------------------------------------------------------------- 1. File List for the National Transportation Analysis Regions (NTAR) 1995-2001 dataset. A. Filename: NTAR_NTAD1995_NTAD2001.zip Short description: Compressed file folders containing the geospatial data for National Transportation Analysis Regions (NTAR) 1995-2001 dataset. File folders are classified first by initial NTAD publication year and secondly by the final year of publication. B. Filename: bts_NTAD_NTAR_DMP_20250529.pdf Short description: A PDF file containing the Data Management Plan that was created for current and future management of the data and associated files. C. Filename: bts_NTAD_NTAR_README_20250529.txt Short description: The README.txt file that includes human-readable information about the data, variable definitions, contact information, and other contextual information. The file you are reading now. 2. File List for the NTAR_NTAD1995_NTAD2001.zip. A. Filename: NTADXXXX_SHP_Final_NTAR.zip Short description: Compressed file folders containing the geospatial data for National Transportation Analysis Regions (NTAR) 1995-2001 dataset. File folders are classified by NTAD publication year and data vintage year respectively. 3a. File List for the NTADXXXX_SHP_Final_NTAR.zip collection. A. Filename: NTAR*.shp Short description: A shapefile containing the geospatial data for National Transportation Analysis Regions (NTAR) 1995-2001 dataset. This includes associated files with extensions .prj, .dbf, .sbn, .sbx, .shx. B. Filename: NTAR.MET and ntar.htm Short description: Text files containing key metadata and documentation information such as methodology, procedures, data dictionary, etc. ---------------------------------------------------------------- D. METHODOLOGICAL INFORMATION ---------------------------------------------------------------- 1. Description of methods used for collection/generation of data: N/A 2. Instrument- or software-specific information needed to interpret the data: The data and documentation files can be opened with Esri ArcMap and any GIS software package. ---------------------------------------------------------------- E. DATA-SPECIFIC INFORMATION ---------------------------------------------------------------- 1. National Transportation Analysis Regions (NTAR) data table This dataset is not receiving updates. Dataset Manager is contacted to verify changes to data resulting in NTAD update. The metadata is updated in the same manner. For the most recent data, please visit the NTAD catalog at A. Number of variables (columns): The data dictionary found in (PDF documentation) provides definitions for the variables B. Data Dictionary/Variable List: Because of the large number of variables, please refer to the Data Dictionary found within the file NTAR.txt for names, definitions, and formats of variables. C. Missing data codes: None ---------------------------------------------------------------- F. UPDATE LOG ---------------------------------------------------------------- This bts_NTAR_20250529_README.txt file was originally created on 2021-09-07 by Dominic Menegus, Geographer, dominic.menegus@dot.gov [Note changes or update to the readme.txt file, e.g.:] 2021-03-11: Original file created 2021-08-31: Update to README content to reflect data reorganization and review. 2025-05-29: File revision, including dataset descriptions and file organization