NHTS
FHWA

NHTS Data Center

Citation

To recognize the valuable role of National Household Travel Survey (NHTS) data in the transportation research process and to facilitate repeatability of the research, users of NHTS data are asked to formally acknowledge the data source. Where possible, this acknowledgement should take place in the form of a formal citation, such as when writing a research report, planning document, on-line article, and other publications. The citation can be formatted as follows:

U.S. Department of Transportation, Federal Highway Administration, 2009 National Household Travel Survey. URL: http://nhts.ornl.gov.

2009 NHTS - Version 2.1, February 2011

Also see 2009 Publications for documentation.

Datasets

File Format Download Size (MB) Installed Size (MB)
SAS Windows Binary (.sas7bdat) 100 670
SAS Transport 100 600
DBase .dbf 90 990
ASCII .csv 100 620

2010 Geocode Update

Description Download Size (MB) Installed Size (MB)
2010 geocode update for the 2009 NHTS in SAS Windows binary and CSV formats. See the documentation for additional information. 2 11

Replicate Weights

Description Download Size (MB) Installed Size (MB)
SAS Windows Binary (.sas7bdat) 530 930
ASCII .csv 380 990

Roster File

Description Download Size (MB) Installed Size (MB)
Roster file in SAS Windows binary format, Proc Format source code, and documentation. 3 40

Trip Chaining

Description Download Size (MB) Installed Size (MB)
SAS Windows Binary (.sas7bdat) 30 200
ASCII .csv 20 175
Also see the documentation, the handout, and the 1995/2001 Trip Chaining datasets.

Source Code

Title Description
Formats.sas SAS PROC FORMAT library

2009 NHTS Transferability

The Bureau of Transportation Statistics (BTS) has developed 2009 NHTS Transferability Statistics by census tract. Support is provided by BTS.

2001 NHTS - Version 4.0, July 2005

User's Guide
Release Notes

Datasets

File Format Download Size (MB) Installed Size (MB)
SAS Transport 60 430
DBase .dbf 70 670
ASCII .csv 60 450

Replicate Weights*

File Format Download Size (MB) Installed Size (MB)
SAS Windows Binary (.sd2) 560 710
ASCII .csv 420 1100
* For analysis of the Vehicle file, use the household-level replicate weight. For analysis of the Travel Day file, use the person-level replicate weight multiplied by 365. See Users Guide sections 7-D and 7-E for additional information.

Trip Chain Datasets* for 2001 NHTS and 1995 NPTS

File Format Download Size (MB) Installed Size (MB)
SAS 80 650
* For additional information, see the Trip Chaining handout

Source Code

Title Description
Formats.sas SAS PROC FORMAT library
Import.sas Provides example source code to import the contents of the SAS transport file

2001 NHTS Transferability National Files

Transferring 2001 National Household Travel Survey (ORNL report) [PDF]

Datasets

Description Download Size (MB) Installed Size (MB)
Transferability statistics by Tract, CSV format 120 280
Example Tract spreadsheet, Excel 2003 XML format - -
Transferability statistics by TAZ, CSV format 4 20
Example TAZ spreadsheet, Excel 2003 XML format - -

1995 NPTS

User's Guide
Release Notes

Datasets

File Format Download Size (MB) Installed Size (MB)
SAS Transport 30 230
DBase .dbf 30 240
ASCII .csv 30 240

Trip Chain Datasets* for 2001 NHTS and 1995 NPTS

File Format Download Size (MB) Installed Size (MB)
SAS 80 650
* For additional information, see the Trip Chaining handout

Source Code

Title Description
Formats.sas SAS PROC FORMAT library
Import.sas Provides example source code to import the contents of the SAS transport file
se.shtml SAS macro to calculate standard errors

1990 NPTS

User's Guide

Datasets

File Format Download Size (MB) Installed Size (MB)
SAS Transport 10 70
ASCII .csv 10 80

Travel Day with Adjusted Weights*

File Format Download Size (MB) Installed Size (MB)
SAS 6 60
* For additional information, see the Summary of Travel Trends, Appendix 3

1983 NPTS

For additional information including introduction, glossary of terms, Users Guide, reports, and SAS datasets see the FHWA 1983 NPTS Web site.

Datasets

File Format Download Size (MB) Installed Size (MB)
SAS Transport 3 40
ASCII.csv 3 34

Source Code

Title Description
Import.sas Provides example source code to import the contents of the SAS transport file

Research Datasets

Title Date Links
Estimation and Short Range Forecasting of County Level Vehicle Miles of Travel and Motor Fuel Use for the United States (through 2015) March, 2009 Paper [PDF]
Datasets [XLS]

Developed by the CTA, ORNL under funding from the FHWA