U.S. Class I railroads - miles of operated freight railroad 2015

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Data in this statistic includes trackage rights.
* Miles of railroad operated is synonymous with route-miles (so that a mile of single track is counted the same as a mile of double track). Sidings, turnouts, yard switching mileage, and mileage not operated are excluded. Miles operated under trackage rights provided by another (owning) railroad are included. Year-to-year changes in miles operated are due to both changes in track mileage and changes in the number of railroads with rights for the same track.
** According to the Association of American Railroads, a Class I railroad is a railroad with operating revenues of at least 457.91 million U.S. dollars in 2015.