Norfolk Southern Railway in the context of "Norfolk and Western Railway"

A wind gap (or air gap) is a gap through which a waterway once flowed that is now dry as a result of stream capture. A water gap is a similar feature, but one in which a waterway still flows. Water gaps and wind gaps often provide routes which, due to their gently inclined profile, are suitable for trails, roads, and railroads through mountainous terrain.

Examples of wind gaps in the Blue Ridge Mountains of Virginia include Swift Run Gap, Rockfish Gap, and Buford's Gap. The last was the original crossing of the Blue Ridge Mountains near Bedford for the Virginia and Tennessee Railroad, later the Norfolk and Western Railway, a precursor of today's Norfolk Southern Railway system. Another wind gap with substantial importance in U.S. history is the Cumberland Gap near the junction of Kentucky, Virginia, and Tennessee.

CSX Transportation (reporting mark CSXT), known colloquially as simply CSX, is a Class I freight railroad company operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. Operating about 21,000 route miles (34,000 km) of track, it is the leading subsidiary of CSX Corporation, a Fortune 500 company headquartered in Jacksonville, Florida.

CSX Corporation was formed in 1980 from the merger of Chessie System and Seaboard Coast Line Industries, two holding companies that controlled railroads operating in the Eastern United States. Initially only a holding company, the subsidiaries that made up CSX Corporation completed merging in 1987. CSX Transportation formally came into existence in 1986, as the successor of Seaboard System Railroad. In 1999, CSX Transportation acquired about half of Conrail in a joint purchase with competitor Norfolk Southern Railway. In 2022, it acquired Pan Am Railways, extending its reach into northern New England.

Conrail Shared Assets Operations (CSAO) is the commonly used name for modern-day Conrail (reporting mark CRCX), an American railroad company. It operates three networks, the North Jersey, South Jersey/Philadelphia, and Detroit Shared Assets Areas, where it serves as a contract local carrier and switching company for its owners, CSX Transportation and the Norfolk Southern Railway. When most of the former Conrail's track was split between these two railroads, the three shared assets areas (a total of about 1,200 miles of track) were kept separate to avoid giving one railroad an advantage in those areas. The company operates using its own employees and infrastructure but owns no equipment outside MOW equipment.

Burnside is one of the 77 community areas in Chicago. The 47th numbered area, it is located on the city's far south side. This area is also called "The Triangle" by locals, as it is bordered by railroad tracks on every side; the Canadian National Railway on the west, the Union Pacific Railroad on the south and the Norfolk Southern Railway on the east. With a population of 2,254 in 2016, it is the least populous of the community areas, as well as the second smallest by area after Oakland.

Buford's Gap is a wind gap in the Blue Ridge Mountains in Bedford County, Virginia. Buford's Gap was the original crossing of the Blue Ridge Mountains for the Virginia and Tennessee Railroad, later the Norfolk and Western Railway, a precursor of today's Norfolk Southern Railway system. It was the site of a battle in 1864 during the American Civil War. U.S. Route 460 also passes through the gap.

The Virginia and Tennessee Railroad was an historic 5 ft (1,524 mm) gauge railroad in the Southern United States, much of which is incorporated into the modern Norfolk Southern Railway. It played a strategic role in supplying the Confederacy during the American Civil War.

Conrail (reporting mark CR), formally the Consolidated Rail Corporation, was the primary Class I railroad in the Northeastern United States between 1976 and 1999. The trade name Conrail is a portmanteau based on the company's legal name. It continues to do business as an asset management and network services provider in three Shared Assets Areas that were excluded from the division of its operations during its acquisition by CSX Corporation and the Norfolk Southern Railway.

The federal government created Conrail to take over the potentially profitable lines of multiple bankrupt carriers, including the Penn Central Transportation Company and Erie Lackawanna Railway. After railroad regulations were lifted by the 4R Act and the Staggers Act, Conrail began to turn a profit in the 1980s and was privatized in 1987. The two remaining Class I railroads in the East, CSX Transportation and the Norfolk Southern Railway (NS), agreed in 1997 to acquire the system and split it into two roughly-equal parts (alongside three residual shared-assets areas), returning rail freight competition to the Northeast by essentially undoing the 1968 merger of the Pennsylvania Railroad and New York Central Railroad that created Penn Central. Following approval by the Surface Transportation Board, CSX and NS took control in August 1998, and on June 1, 1999, began operating their respective portions of Conrail.

The New York Central Railroad (reporting mark NYC) was a railroad primarily operating in the Great Lakes and Mid-Atlantic regions of the United States. The railroad primarily connected greater New York and Boston in the east with Chicago and St. Louis in the Midwest, along with the intermediate cities of Albany, Buffalo, Cleveland, Cincinnati, Detroit, Rochester and Syracuse. The New York Central was headquartered in the New York Central Building, adjacent to its largest station, Grand Central Terminal.

The railroad was established in 1853, consolidating several existing railroad companies. In 1968, the NYC merged with its former rival, the Pennsylvania Railroad, to form Penn Central. Penn Central went into bankruptcy in 1970 and, with extensive Federal government support, emerged as Conrail in 1976. In 1999, Conrail was broken up, and portions of its system were transferred to CSX and Norfolk Southern Railway (NS), with CSX acquiring most of the NYC's eastern trackage and NS acquiring most of NYC's western trackage.