Freight railroads have more than doubled their fuel efficiency since 1980, according to the Association of American Railroads. Class I railroads averaged 480 ton-miles to the gallon in 2009, up significantly from the benchmark of 436 ton-miles. "America can save even more fuel by shipping more by train," said AAR President Edward R. Hamberger. "If just 10% of the long-haul freight currently moving on our crowded highways was moved by rail, annual fuel savings would exceed 1 billion gallons."

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