Altogether, Americans drove over 3 trillion miles in 2007. For about 25 years from 1980-2005, the average annual VMT per licensed driver had been increasing. The annual VMT per licensed driver has been decreasing since 2005. Demographic shifts, the increase in gas prices and the economy may have influenced the shift in driving behavior.
Data Source: US Department of Transportation, Federal Highway Administration, Office of Highway Policy Information, Highway Statistics.
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