Main Line (Seaboard Air Line Railroad)

Main Line
Overview
Other name(s)	S-Line
Status	Some segments are still operating
Owner	Seaboard Air Line Railroad (1900-1967) Seaboard Coast Line Railroad (1967-1982) Seaboard System Railroad (1982-1986) CSX Transportation (1986-present)
Termini	Richmond, Virginia Tampa, Florida
Technical
Line length	845 mi (1,360 km)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	No
Signalling	Centralized traffic control
Route map The SAL Main Line (blue) in relation to the ACL Main Line (red). Dashed lines represent where the line has been abandoned.

The Seaboard Air Line Railroad’s Main Line was the backbone of the Seaboard Air Line Railroad's network in the southeastern United States. The main line ran from Richmond, Virginia to Tampa, Florida, a distance of over 800 miles. Along its route it passed through Petersburg, Raleigh, Columbia, Savannah, Jacksonville, and Ocala, Florida. While some segments of the line have been abandoned as of 2023, most of the line is still in service and is owned by the Seaboard Air Line's successor, CSX Transportation as their S-Line.