• http://www.treehugger.com/files/2009/05/rail-trucking-greenest.php

    Compared to trucking, rail transit does sport higher efficiency numbers - today's average train has an efficiency of 400 ton-miles per gallon whereas trucks currently hover around 130 ton-miles per gallon. Still, there are numerous reasons why addressing truck efficiency remains important, if not critical. For example, peer-reviewed research and companies like Wal-Mart have proved that trucks can easily achieve 260 ton-miles per gallon. And reaching 300+ ton-miles per gallon is not much harder, especially when a truck carries two or three trailers.

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