|Year||Automobiles||Light trucksa||All trucksb|
KEY: N = data do not exist; R = revised.
a Gross vehicle weight 1-3.
b Gross vehicle weight 1-8.
The National Household Travel Survey (formerly the Nationwide Personal Transportation Survey), conducted by the U.S. Department of Transportation, estimates the mean age of household vehicles for several years:
KEY: N = data do not exist.
The 1969, 1977, 1983, and 1990 surveys do not include a separate category for sports utility vehicles (SUV), while the 1995 and 2001 surveys do. In the 1990, most SUVs were classified as automobiles. SOURCE: U.S. Department of Transportation, Federal Highway Administration, 1995 Nationwide Personal Transportation Survey: Summary of Travel Trends (Washington, DC: 1999); U.S. Department of Transportation, Federal Highway Administration, Bureau of Transportation Statistics, 2001 National Household Travel Survey (NHTS) data, available at Internet site http://nhts.ornl.gov/2001/index.shtml as of Aug. 21, 2003.
Data are as of July 1 of each year.
The R.L. Polk Co., Internet site http://www.polk.com as of Feb. 9, 2004.