A CSX train is led by two GE AC6000CW locomotives, with the #5000 "Diversity in Motion" unit leading
|Locale||Eastern United States, Southwestern Ontario, and southwestern Quebec|
|Dates of operation||1986–present|
|Track gauge||4 ft 8 1⁄2 in (1,435 mm) (standard gauge)|
|Length||21,000 mi (34,000 km)|
CSX Transportation (reporting mark CSXT) is a Class I railroad in the United States. It is the main subsidiary of the CSX Corporation. The company is headquartered in Jacksonville, Florida, and owns approximately 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. This railroad also serves the Canadian provinces of Ontario and Quebec.
CSX Transportation was formed on July 1, 1986, as a combining and renaming of the Chessie System and Seaboard System Railroad into one entity. The originator of the Seaboard System was the former Seaboard Air Line Railroad, which previously merged Atlantic Coast Line Railroad in 1967, and later Louisville and Nashville Railroad, as well as several smaller subsidiaries such as the Clinchfield Railroad, Atlanta and West Point Railroad, and the Georgia Railroad (Georgia Railroad and Banking Company). On August 31, 1987, the Chesapeake and Ohio Railway, which had absorbed the Baltimore and Ohio Railroad on April 30 of that year, merged into CSX. The merger had been started in 1986 with the merger of Chessie System and Seaboard Coast Line Industries to form the CSX Corporation.
On June 23, 1997, CSX Transportation and Norfolk Southern filed a joint application with the Surface Transportation Board for authority to purchase, divide and operate the assets of the 11,000-mile Consolidated Rail Corporation (Conrail), which had been created in 1976 by bringing together several ailing Northeastern railway systems into a government-owned corporation. On June 6, 1998, the STB approved the CSX–NS application and set August 22, 1998, as the effective date of its decision. CSX acquired 42 percent of Conrail's assets, and NS received the remaining 58 percent. As a result of the transaction, CSX's rail operations grew to include some 3,800 miles of the Conrail system (predominantly lines that had belonged to the former New York Central Railroad). CSX began operating its trains on its portion of the Conrail network on June 1, 1999. CSX now serves much of the eastern U.S., with a few routes into nearby Canadian cities.
The name came about during merger talks between Chessie System, Inc. and Seaboard System Railroad, Inc., commonly called Chessie and Seaboard. The company chairmen said it was important for the new name to include neither of those names because it was a partnership. Employees were asked for suggestions, most of which consisted of combinations of the initials. At the same time a temporary shorthand name was needed for discussions with the Interstate Commerce Commission. CSC was chosen but belonged to a trucking company in Virginia. CSM (for Chessie-Seaboard Merger) was also taken. The lawyers decided to use CSX, and the name stuck. In the public announcement, it was said that "CSX is singularly appropriate. C can stand for Chessie, S for Seaboard, and X, which actually has no meaning. But the X could be used as a short term for the word "Express" taking off the "E" giving out "Xpress", putting the X in use. " The T had to be added to CSX when used as a reporting mark because reporting marks that end in X means that the car is owned by a leasing company or private car owner. Its current slogan, "How Tomorrow Moves", appeared in 2008.
CSX divisions 
Northern Region Divisions
- Great Lakes Division – Based in Indianapolis, Indiana
- Chicago Division – Based in Calumet City, Illinois
- Albany Division – Based in Selkirk, New York
- Baltimore Division – Based in Baltimore, Maryland
- Louisville Division – Based in Cincinnati, Ohio
There are two lines in the Northern Region that travels into Canada:
- Sarnia Subdivision (Chicago Division) from Chatham, Ontario to Sarnia, Ontario, then across the border to Port Huron subdivision via Port Huron, Michigan.
- Montreal Subdivision (Albany Division) from Kahnawake, Quebec to Massena, New York
Southern Region Divisions
- Atlanta Division – Based in Atlanta, Georgia
- Huntington Division – Based in Huntington, West Virginia
- Nashville Division – Based in Nashville, Tennessee
- Florence Division – Based in Florence, South Carolina
- Jacksonville Division – Based in Jacksonville, Florida (at Dufford Center)
Unit trains 
CSX operates the Juice Train, train numbers Q740 and Q741, a intermodel train consisting of COFC and the Tropicana cars that carry fresh orange juice between Bradenton, Florida and Greenville section of Jersey City, New Jersey. At Jacksonville, Florida, Q740 is split and cars not sent to Greenville are sent to terminals in Cincinnati, Ohio, and Los Angeles, California. Q741 hauls both Tropicana and intermodal traffic to Jacksonville, Florida. The train is also split at Jacksonville with sections to Bradenton, Florida, and Fort Pierce, Florida, via the Florida East Coast Railway. In the 21st century, CSX Juice Trains have been the focus of efficiency studies and have received awards. They are considered good examples of how modern rail transportation can compete successfully with trucking and other modes to carry perishable products.
CSX also runs daily trash trains from New York City to Philadelphia and then Petersburg, Va where they're interchanged with Norfolk Southern. Q702/Q703 originate in Philadelphia and terminate in Collier Yard just south of Petersburg, Va. These trains usually consist of about 50 cars with four 20‑foot containers of trash on each.
Another style of unit train is a local trash train, D765, runs between Derwood and Dickerson, both in Maryland. The train runs daily except on Sundays; on holidays it sometimes runs twice a day. Trash is carried from Montgomery County's Shady Grove Transfer Station to a waste-to-energy plant located off the PEPCO lead to Mirant's Dickerson Generating Station. The trip is roughly 17 miles (27 km), and the train is made up of National Steel Car Company-built well cars, hauling 40‑foot containers. The first NEMX equipment was built when the D765 first started operations in 1995. In recent years, the fleet has been somewhat upgraded, repainted, and new cars have been constructed. In the early days, the locomotives powering the train were a GP40-2/RDMT slug set, but currently the train can be upwards of 47 cars. The locomotives that now routinely power the train are a pair of EMD SD50s.
Working with Union Pacific, CSX runs an extended-haul perishables train, Q090; known by the railroad as the "Apple Train" or "Salad Shooter", from Wallula to Schenectady. This train typically runs with three of Union Pacific's newest locomotives and has its extended haul inspection from Wallula to Schenectady at Cleveland – Collinwood Yard on CSX headed in both directions, but on the return trip the train is labeled as a Q091. The CSX Train Handling rule book is modified specially for this train to allow use of more power axles.
CSX currently uses a blue and gold paint scheme for its locomotives. Former CR locomotives can be spotted by recognizing phase differences in engine models and numbering. Other spotting details can be inconsistent, but can include a number of the following: red marker lights, Leslie model RS3L air horns, former Conrail SD40-2s ride on Flexicoil "C" trucks and have anticlimbers, ditch lights mounted beneath the anticlimber, headlights above the cab (vs. CSX's standard practice of nose mounted headlights on all wide nose GE units), and modified "Bright Future" paint with battery box faces painted yellow versus black or blue. There are no longer any Conrail-painted locomotives in active service with CSX.
CSX has created a paint scheme, known as YN3, which debuted in 2002 on EMD SD50 8503, now downgraded to an SD50-2. Currently, CSX has over 1000 YN3-painted locomotives and are continuing to paint their locomotives in YN3. The vast majority of CSX locomotives today have flashing ditch lights.
CSX recently created a new paint scheme known commonly as YN3b, which incorporates the most recent CSX logo with the former YN3 scheme. The first unit to wear this scheme was ES44AH 950. Currently, CSX's ES44AHs 950-999 & 3000-3059 wear the scheme, along with several recently repainted older locomotives, the first of which was SD70MAC 4719, which was repainted at the Huntington locomotive shops in September, 2012.
A CSX C40-8 in the YN2 "Bright Future" color scheme rests inside a railroad yard in Florida.
Currently operating rail yards 
CSX operates a number of large classification yards around the system that include "hump yard" operations. Trains are slowly pushed over a small manmade hill as cars are uncoupled at the crest of the hill and allowed to roll down the hump into the appropriate tracks for outbound trains. These are located at:
Hump Yards (12)
- Atlanta, Georgia – Tilford Yard
- Avon, Indiana – Avon Yard
- Birmingham, Alabama – Boyles Yard
- Cincinnati, Ohio – Queensgate Yard
- Cumberland, Maryland – Cumberland West Hump (East Hump shut down)
- Hamlet, North Carolina – Hamlet Yard
- Louisville, Kentucky – Osborn Yard (for Prime F. Osborn former President of CSX)
- Nashville, Tennessee – Radnor Yard
- Selkirk, New York – Selkirk Yard
- Toledo, Ohio – Stanley Yard
- Waycross, Georgia – Rice Yard
- Willard, Ohio – Willard Yard (Double Hump, Eastbound and Westbound)
- Baltimore, Maryland – Curtis Bay Yard, Locust Point Yard, Bayview Yard, Penn Mary Yard, Mt. Clare "A" Yard, Mt. Winans Yard, Grays Yard
- Chicago, Illinois – Barr Yard
- Dearborn, Michigan – Rougemere Yard
- Grand Rapids, Michigan - Wyoming Yard
- Russell, Kentucky – Russell Yard
- Cleveland, Ohio – Collinwood Yard and Clark Ave. Yard
- Bronx, New York - Oak Point Yard
- Buffalo, New York – Frontier Yard
- Newark, New Jersey – Oak Island Yard, shared with Norfolk Southern
- North Bergen, New Jersey - North Bergen Yard
- North Haven, Connecticut – Cedar Hill Yard
- Framingham, Massachusetts – Nevins Yard
- Watertown, New York – Massey Yard
- Syracuse, New York – DeWitt Yard
- Wilmington, Delaware – Wilsmere Yard
- Richmond, Virginia – Acca Yard and Fulton Yard
- Charleston, South Carolina – Bennett Yard
- Charlotte, North Carolina – Pinoca Yard
- Spartanburg, South Carolina – Maxwell Yard
- Columbia, South Carolina – Cayce Yard
- Savannah, Georgia – Southover Yard
- Columbus, Ohio – Parsons Yard
- Dayton, Ohio – Needmore Yard
- Middletown, Ohio – North Excello Yard
- Hamilton, Ohio – New River Yard
- Toledo, Ohio – Walbridge Yard
- North Baltimore, Ohio – Northwest Ohio Intermodal Terminal
- Rochester, New York – Goodman Street Yard
- Evansville, Indiana – Howell Yard
- New Castle, Pennsylvania - New Castle Yard
- Akron, Ohio - Akron "Hill" Yard
- Lordstown, Ohio - Goodman Yard (Lordstown)
- Baldwin, Florida - Baldwin Yard
- Jacksonville, Florida - Moncrief Yard
- Jacksonville, Florida - Duval Yard
- Jacksonville, Florida - Busch Yard
- Jacksonville, Florida - Export Yard
- Tampa, Florida - Yeoman Yard
- Lakeland, Florida - Winston Yard
- Mulberry, Florida - Mulberry Yard
- Orlando, Florida - Taft Yard
- Wildwood, Florida - Wildwood Yard
- Hialeah, Florida - Hialeah Yard
- Washington, DC - Benning Yard
See also 
- CSX milepost prefixes
- History of railroads in Michigan
- List of CSX Transportation lines
- List of CSX Transportation predecessor railroads
- Railex (refrigerated rail service - CSX and Union Pacific Railroad)
- CSX Transportation, Jacksonville, FL. "Company Overview." Accessed 2012-12-02.
- CSX Transportation. "Our Evolution and History." Interactive timeline. Accessed 2012-12-02.
- Dolinger, Milt (2006-05-01). "How CSX got its name". Trains magazine online.
- Air Brake and Train Handling Rules. Rule 5502-A-4: CSX Transportation. October 2007. pp. Section 4, Page 1.
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