Study finds that increased vehicle travel and decreased occupancy have undercut the impact of improving fuel economy over last 40 years
Green Car Congress
MARCH 6, 2013
Sivak found that while the vehicle fuel economy of the entire light-duty fleet improved by 40% (from 13 mpg US to 21.6 mpg US, or from 18.1 mpg US to 29.8 mpg US, or 9.5 occupants carried) decreased by 27% (from 1.9 persons), the occupant distance travelled increased by 84% (from 3.182 to 5.867 trillion km).
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