Monthly data, not seasonally adjusted 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. |Highway miles
(millions)||233,106||236,361| |Percent change from same month
previous year||-5.25||1.40| 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 February 2010.