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Early last week the State Smart Transportation Initiative, a sustainable transport program funded by the Department of Transportation, released some charts on the continued decline of vehicle-miles traveled in the United States. Overall VMT dropped 1.2 percent in 2011 from the previous year, reaching its lowest total since 2003, and per capita VMT fell 2.1 percent to levels not seen since 1998.
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http://m.theatlanticcities.com/commute/2012/03/urbanism-slowing-rise-car-travel/1372/