Vehicle miles traveled (VMT) are key data for highway planning and management, and a common measure of roadway use. Along with other data, VMT are often used in estimating congestion, air quality, and potential gas-tax revenues, and can provide a general measure of the level of the nation's economic activity.
|Vehicle Miles Traveled||Jun-06||Jun-07|
|Highway miles (millions)||261,657||260,340|
|Percent change from same month previous year||-0.71||-0.50|
NOTE: The current value is compared to the value from the same period in the previous year to account for seasonality.
SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Highway Policy Information, "Traffic Volume Trends", available at http://www.fhwa.dot.gov/, as of August 2007.