The Baltimore and Ohio Railroad was the first common carrier railroad and the oldest railroad in the United States. It operated as B&O from 1830 until 1987, when it was merged into the Chessie System; its lines are today controlled by CSX Transportation.
The Lake Shore and Michigan Southern Railway, established in 1833, and sometimes referred to as the Lake Shore, was a major part of the New York Central Railroad's Water Level Route from Buffalo, New York, to Chicago, Illinois, primarily along the south shore of Lake Erie and across northern Indiana. The line's trackage remains a major rail transportation corridor used by Amtrak passenger trains and several freight lines; in 1998, its ownership was split at Cleveland, Ohio, between CSX Transportation to the east and Norfolk Southern Railway in the west.
The Capital Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland and the District of Columbia. The line runs from near Baltimore, Maryland, southwest to Washington, D.C., along the former Baltimore and Ohio Rail Road (B&O) Washington Branch. The subdivision's Alexandria Extension provides a connection to Virginia and points south.
The Porter Subdivision is a railroad line owned by CSX Transportation in the Chicago, Illinois, area. Formerly a part of the main line of the Michigan Central Railroad, it now connects CSX's former Baltimore and Ohio Railroad line and the Chicago Fort Wayne and Eastern Railroad from the east with the Indiana Harbor Belt Railroad towards Blue Island, Illinois.
The Mountain Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Cumberland, Maryland, west to Grafton, West Virginia, along the original Baltimore and Ohio Railroad (B&O) main line. It was known as the West End Subdivision until the B&O's absorption into the Chessie System, and included the B&O's original crossing of the Allegheny Mountains. Through CSX traffic to the west from Cumberland now uses the Keystone Subdivision over Sand Patch Grade.
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 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 Philadelphia Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania, Delaware, and Maryland. The line runs from Philadelphia, Pennsylvania, southwest to Baltimore, Maryland, along a former Baltimore and Ohio Railroad (B&O) line.
The Metropolitan Subdivision is a railroad line owned and operated by CSX Transportation in Washington, D.C. and Maryland.The 53-mile line runs from Washington, D.C., northwest to Weverton, Maryland, along the former Metropolitan Branch of the Baltimore and Ohio Railroad.
The Indianapolis Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Ohio and Indiana. The line runs from Hamilton, Ohio, west to Indianapolis, Indiana, along a former Baltimore and Ohio Railroad line.
The Toledo Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Ohio. The line runs 167.8 miles (270.0 km) from Hamilton north to Perrysburg. It was originally built by predecessors of the Baltimore and Ohio Railroad.
The New Castle Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Pennsylvania and Ohio. The line runs from New Castle, Pennsylvania west through Youngstown and Akron to Greenwich, Ohio along a former Baltimore and Ohio Railroad line. Its east end is near Mahoningtown, at the west end of the New Castle Terminal Subdivision. Its west end is at the Willard Terminal Subdivision, just east of the Greenwich Subdivision junction at Greenwich. It junctions with the Newton Falls Subdivision at Newton Falls, Ohio, and the CL&W Subdivision at Sterling, Ohio.
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 Marietta Subdivision is a railroad line owned by CSX Transportation and operated by Belpre Industrial Parkersburg Railroad in the U.S. states of West Virginia and Ohio. The line runs from Parkersburg, West Virginia, west to Belpre, Ohio, and north via Marietta to Relief along a former Baltimore and Ohio Rail Road line. Its south end is at a connection to the Ohio River Subdivision; the line crosses the Ohio River on the Parkersburg Bridge between Parkersburg and Belpre.
The CL&W Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Ohio. The line runs from a junction with the New Castle Subdivision at Sterling northwest to Lorain along a former Baltimore and Ohio Rail Road line. It junctions with the Cleveland Subdivision at Lester and the Greenwich Subdivision at Grafton.
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 Barr Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Indiana and Illinois. The line runs from Willow Creek, west to just west of Blue Island, Illinois, along a former Baltimore and Ohio Railroad (B&O) line. At its east end, it junctions with the Porter Subdivision and Garrett Subdivision; its west end is at the south end of the Blue Island Subdivision, with access to the New Rock Subdivision via trackage rights over the Metra Rock Island District and access to the Indiana Harbor Belt Railroad. Junctions exist with the Lake Subdivision at Pine Junction in Gary, Indiana and with the Chicago Heights Subdivision at Harvey Junction.
The Baltimore and Ohio and Chicago Railroad (B&O&C) was a subsidiary of the Baltimore and Ohio Railroad (B&O) that owned the line from Willard, Ohio to Chicago, Illinois.
Willow Creek is a neighborhood in the city of Portage, Indiana in Porter County. It is the location of the junction of the Garrett Subdivision, Porter Subdivision, and Barr Subdivision, all sections of the CSX Railroad.
