FIGURE 1 Changes in Travel and Demographics from the NHTS: 1969, 1977, 1983, 1990, and 1995 NPTS, and 2001 and 2009 NHTS
KEY: NHTS = National Household Travel Survey; NPTS = Nationwide Personal Transportation Survey.
SOURCES: U.S. Department of Transportation (USDOT), Federal Highway Administration (FHWA), Summary Statistics on Demographic Characteristics and Total Travel: 1969, 1977, 1983, 1990, and 1995 NPTS (October 1999), Table NPTS-1, available at https://www.fhwa.dot.gov/ as of July 2015. VMT: USDOT, FHWA, Highway Statistics 2013, Chart VMT-421C, available at https://www.fhwa.dot.gov/ as of July 2015.