|Railroad||Miles operated in the District of Columbia1|
|Class I railroads||34|
|Norfolk Southern Corporation||13|
|Switching and terminal railroads||5|
|Washington Terminal Company||5|
|Canadian Pacific Railway||6|
1 Miles operated is in terms of railroad 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.
NOTE: For definition of railroad types see previous table.
SOURCE: Association of American Railroads, Railroads and States - 2000, Washington, DC: 2002, available at http://www.aar.org/AboutTheIndustry/StateInformation.asp as of Mar. 19, 2002.