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Traffic moves along a freeway in Houston in this 2002 file photo. 'Green' cities like San Francisco have many green initiatives, but so far there's nothing to encourage residents of 'brown' cities, like Houston, to move there. (Michael Stravato/AP/File)
4. Houston
Yearly delay: 58 hours
Cost per driver: $1,332
In 2009, 3.9 billion gallons of fuel were wasted in the United States, says the urban mobility report. That's about the same amount that flows through the Alaska Pipeline over 130 days.
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