2017 National Household Travel Survey – California Add-On

The California add-on survey supplements the 2017 National Household Travel Survey (NHTS) with additional household samples and detailed travel behavior for an assigned travel day.

Data Collection Agency

The Federal Highway Administration conducted the NHTS and corresponding add-on surveys. The California add-on survey was conducted at the request of the California Department of Transportation.

Methodology

The Federal Highway Administration conducted the NHTS with assigned travel dates from April 19, 2016 through April 25, 2017. The NHTS collected data on the demographic and socioeconomic composition of households, as well as detailed information on travel behavior nationwide.

State transportation departments and metropolitan planning agencies had the opportunity to purchase extra household samples as part of the NHTS add-on program. These additional samples, along with national samples collected in the add-on areas, are compiled for use in transportation planning, forecasting, and research. The California Department of Transportation participated in the NHTS add-on program and received a total of 26,095 household samples in California (total number of household samples nationwide is 129,112).

Survey Records

Survey records include a total of 55,793 participants.

Transportation Data

The NHTS California add-on data package contains a demographic and socioeconomic composition of 26,095 household samples in California, as well as detailed information on the travel behavior of each household for one assigned day. It does not contain data pertaining to residence type (i.e., single family home, apartment, condo, etc.). For details on available data and variable definitions, see the data dictionary.

Transportation data are available as zipped files. Download Winzip.

For the study's latitude and longitude data, learn how to access the spatial data.

How To Cite the Data

If you use TSDC data in a publication, please contact us and include a citation in your publication consistent with the following format:

"Transportation Secure Data Center." [(year)]. National Renewable Energy Laboratory. Accessed [date]: www.nrel.gov/tsdc.