List of CSX Transportation lines
owns and operates a vast network of rail lines in the United States east of the Mississippi River. In addition to the major systems which merged to form CSX – the Baltimore and Ohio Railroad, Chesapeake and Ohio Railway, Louisville and Nashville Railroad, Atlantic Coast Line Railroad and Seaboard Air Line Railroad – it also owns major lines in the Northeast acquired from the 1998 breakup of Conrail.
The lines are split into two regions – Northern and Southern, further split into divisions, and finally into subdivisions, most of which consist of a single main line with short branches. Huntington East and West division timetables to be merged 2008.Active lines
!Subdivision
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!colspan=4|Baltimore Division
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!colspan=4|Chicago Division
!Subdivision
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!colspan=4|Former lines
Albany Division
!Subdivision
!From
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!Reason
!colspan=4|Baltimore Division
!Subdivision
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!colspan=4|Chicago Division
!Subdivision
!From
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!colspan=4|Great Lakes Division
!Subdivision
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!colspan=4|Louisville Division
!Subdivision
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!colspan=4|!Subdivision
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!colspan=4|Florence Division
!Subdivision
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!colspan=4|Nashville Division
!Subdivision
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!colspan=4|CSX A Line Division
!Subdivision
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!colspan=4|CSX SX Line Division
!Subdivision
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!colspan=4|Ex-Huntington Division
!Subdivision
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!colspan=4|Appalachian Division
!Subdivision New England @ South Sub
!From Boston MA
!To Miami FL
!Notes