The average automobile on the road in 2013 used 1.2 percent less energy per mile than in 2012, according to table 2-15 of the latest edition of the Department of Energy’s Transportation Energy Data Book. Both cars and light trucks achieved about the same gain.
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In contrast, says the datebook, the average transit bus used 0.9 percent more energy per mile in 2013 than in 2012. Worse, the average number of people on board transit buses declined slightly, so buses used 1.0 percent more energy per passenger mile.
