CSXT

CSX Transportation

CSX system map; trackage rights in purple
Reporting mark	CSXT
Locale	Alabama Connecticut Delaware Florida Georgia Illinois Indiana Kentucky Louisiana Maryland Massachusetts Michigan Mississippi New Jersey New York North Carolina Ohio Ontario Pennsylvania Quebec South Carolina Tennessee Virginia Washington D.C. West Virginia Wisconsin
Dates of operation	July 1, 1986; 30 years ago (1986-07-01)–present
Predecessor	Chessie System Clinchfield Railroad Seaboard System Railroad Conrail Baltimore & Ohio Chesapeake & Ohio Louisville & Nashville Railroad Monon Railroad
Track gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Length	21,000 mi (34,000 km)
Headquarters	Jacksonville, Florida
Website	www.csx.com

CSX Transportation (reporting mark CSXT) is a Class I railroad in the United States. The main subsidiary of the CSX Corporation, the railroad is headquartered in Jacksonville, Florida, and owns about 21,000 route miles (34,000 km). CSX operates one of the three Class I railroads serving most of the East Coast, the other two being the Norfolk Southern Railway (NS) and Canadian Pacific Railway. It also serves the Canadian provinces of Ontario and Quebec. Together CSX and Norfolk Southern Railway have a duopoly over all east-west freight rail traffic east of the Mississippi River. As of October 1, 2014, CSX's total public stock value was slightly over $32 billion.

CSX Transportation was formed on July 1, 1986, by combining the Chessie System and Seaboard System Railroad. The originator of the Seaboard System was the former Seaboard Air Line Railroad, which previously merged with the Atlantic Coast Line Railroad in 1967, and later with the Louisville & Nashville Railroad, as well as several smaller subsidiaries such as the Clinchfield Railroad, Atlanta & West Point Railroad, Monon Railroad and the Georgia Railroad. The origin of the Chessie System was the former Chesapeake & Ohio Railway, which had merged with the Baltimore & Ohio Railroad, and the Western Maryland Railway.