The Marietta and Cincinnati (M&C) was one of five important east-west railroads of southern Ohio; it was later absorbed by the Baltimore and Ohio Railroad (B&O). Its original route ran from Marietta through Vincent, Athens, Hamden, Chillicothe, Greenfield, Blanchester, and Loveland. It had two main branches: Blanchester to Hillsboro, which was originally part of the Hillsboro and Cincinnati Railroad; and Hamden to Portsmouth, Ohio, originally part of the Scioto and Hocking Valley Railroad.
The Keystone Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and Pennsylvania. The line runs from Cumberland, Maryland, west to McKeesport, Pennsylvania, along a former Baltimore and Ohio Railroad (B&O) line. The line includes the well-known Sand Patch Grade over the Allegheny Mountains.
The Ohio River Subdivision is a specific portion of a railroad system that runs along the Ohio River, owned and operated by CSX Transportation in the U.S. state of West Virginia. The line runs from Wheeling southwesterly along the east (left) shore of the Ohio River to Huntington along a former Baltimore and Ohio Railroad line.
The Columbus Line Subdivision is a railroad line owned by CSX Transportation in the U.S. state of Ohio. The line runs from Galion south to Columbus along a former New York Central Railroad line.
The Illinois Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Indiana and Illinois. The line runs from Washington, Indiana, west to East St. Louis, Illinois, along a former Baltimore and Ohio Railroad line.
The Indiana Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Ohio and Indiana. The line runs from Cincinnati, Ohio, west to Washington, Indiana, along a former Baltimore and Ohio Railroad line.
The Harrisburg Subdivision is a railroad line owned by CSX Transportation in Pennsylvania. The line is located in Philadelphia, and connects Greenwich Yard and the Philadelphia Subdivision with the Trenton Subdivision along a former Pennsylvania Railroad line. Much of the Harrisburg Subdivision is the High Line' or West Philadelphia Elevated along 31st Street over the 30th Street Station area.
The Trenton Subdivision is a railroad line owned by CSX Transportation in the U.S. states of Pennsylvania and New Jersey. The line runs from CP NICE in Philadelphia, Pennsylvania, northeast to Port Reading Junction in Manville, New Jersey. The line was formerly part of the Reading Company system.
The Bridgeport Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of West Virginia. The line runs from Grafton west to Clarksburg along a former Baltimore and Ohio Rail Road line. At its east end, the Bridgeport Subdivision becomes the Mountain Subdivision; its west end is at the Short Line Subdivision. It is part of the CSX Baltimore Division.
The Willard Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Ohio. The line runs from Willard west to Deshler along a former Baltimore and Ohio Railroad (B&O) line. At its east end, at Daniels Road west of Willard, the line becomes the Willard Terminal Subdivision. Its west end is at the east end of the Garrett Subdivision, just east of Deshler and the Toledo Subdivision. The line is split at Fostoria by the Fostoria Subdivision, which includes the junction with the Columbus Subdivision, and at Galatea the line intersects the Toledo Branch Subdivision. This was once Amtrak's Three rivers line.
The P&W Subdivision is a railroad line owned and operated by CSX Transportation, the Allegheny Valley Railroad (AVR), and the Buffalo and Pittsburgh Railroad (BPRR) in the U.S. state of Pennsylvania. The line runs from Rankin north through Pittsburgh to West Pittsburg along a former Baltimore and Ohio Railroad line, once the Pittsburgh and Western Railroad.
The Berkshire Subdivision is a railroad line owned by CSX Transportation in the U.S. states of Massachusetts and New York. The line runs from near Springfield, Massachusetts west to Schodack, New York, along a former New York Central Railroad line. Its east end is in Wilbraham, east of Springfield, at the west end of the Boston Subdivision. Its west end is just east of the Alfred H. Smith Memorial Bridge, at a junction with the Castleton Subdivision and Schodack Subdivision. Along the way, the line junctions Amtrak's Post Road Branch in Schodack.
The Post Road Branch is a railroad line owned and operated by Amtrak in the U.S. state of New York. The line runs from a junction with CSX Transportation's Berkshire Subdivision in Castleton-on-Hudson, New York, northwest to CSX's Hudson Subdivision at Rensselaer, New York, along a former New York Central Railroad line. Freight service is provided by CSX Transportation, who calls it the Post Road Subdivision, via trackage rights.
The Amtrak Hudson Line, also known as the CSX Hudson Subdivision, is a railroad line owned by CSX Transportation and leased by Amtrak in the U.S. state of New York. The line runs from Poughkeepsie north along the east shore of the Hudson River to Rensselaer and northwest to Hoffmans via Albany and Schenectady along a former New York Central Railroad line. From its south end, CSX has trackage rights south to New York City along the Metro-North Railroad's Hudson Line. The Hudson Line junctions the Castleton Subdivision in Stuyvesant, Amtrak's Post Road Branch in Rensselaer and the Carman Subdivision in Schenectady. Its northwest end is at a merge with the Mohawk Subdivision. The entirety of the line overlaps with the Empire Corridor, one of Amtrak and the Federal Railroad Administration's candidate lines for future high-speed rail.
The Castleton Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of New York. The line runs from Schodack northwest to Selkirk along a former New York Central Railroad line. At its southeast end, it junctions with the Berkshire Subdivision and Schodack Subdivision. After crossing the Hudson River on the Alfred H. Smith Memorial Bridge, it meets the River Subdivision and Port Subdivision at Selkirk and ends at Selkirk Yard, where the Selkirk Subdivision begins.
The Schodack Subdivision is a railroad line owned by CSX Transportation in the U.S. state of New York. The line runs from Stuyvesant north to Schodack along a former New York Central Railroad line. At its south end, it merges with the Hudson Subdivision; its north is at a junction with the Berkshire Subdivision, and the Castleton Subdivision at the east end of the Alfred H. Smith Memorial Bridge.
The Pittsburgh Subdivision is an American railroad line that is owned and operated by CSX Transportation in the Commonwealth of Pennsylvania.
The Buffalo Line is a railroad line owned by the Norfolk Southern Railway in the U.S. states of New York and Pennsylvania. The line runs from Buffalo, New York southeast to Rockville, Pennsylvania near Harrisburg, Pennsylvania along a former Pennsylvania Railroad line. Its north end is at Seneca Yard in Buffalo, with no direct access to the Lake Erie district, and its south end is at the Pittsburgh Line at Rockville. The line is operated by the Buffalo and Pittsburgh Railroad between Buffalo and Machias, New York, the Western New York and Pennsylvania Railroad between Machias and Driftwood, Pennsylvania, and the Norfolk Southern Railway between Driftwood and Rockville.
The Lincoln Secondary is a railroad line owned and operated by Conrail in the U.S. state of Michigan as part of its Conrail Shared Assets Operations.
The Pittsburgh to St. Louis Main Line was a rail line owned and operated by the Pennsylvania Railroad in the U.S. states of Pennsylvania, Ohio, Indiana, and Illinois. The line ran from Pittsburgh, Pennsylvania west via Steubenville, Ohio, Columbus, Ohio, Dayton, Ohio, Indianapolis, Indiana, Terre Haute, Indiana, and Vandalia, Illinois to East St. Louis, Illinois. In addition to its east end in downtown Pittsburgh, where it met the Main Line and Pittsburgh to Chicago Main Line, junctions included the Columbus to Chicago Main Line at Columbus, the C&X Branch at Xenia, the Columbus to Indianapolis Main Line via Bradford at New Paris, the Richmond Branch and Fort Wayne Branch at Richmond, the Louisville Branch and I&F Branch at Indianapolis, and the Peoria Branch at Farrington, Illinois.
