The U.S. Department of Transportation
conducts the National Household Travel
Survey (NHTS) to assess the country’s
transportation patterns every 5 to 10 years.
The 2009 NHTS updated information
gathered in the 2001 NHTS and in prior
Nationwide Personal Transportation Surveys
(NPTS) conducted in 1969, 1977, 1983, 1990,
and 1995.