CSX Transportation CSXT 725 GE ES44AC-H crossing over the Etowah River on the W&A Subdivision in Cartersville, Georgia on September 17, 2021. #LNHS

The Western & Atlantic Railroad of the State of Georgia (W&A) is a government-owned railroad (by the State of Georgia) and is currently leased by CSX, which CSX operates in the Southeastern United States from Atlanta, Georgia, to Chattanooga, Tennessee.

It was founded on December 21, 1836. The city of Atlanta was founded as the terminus of the W&A, with the terminus marked with the Atlanta Zero Mile Post. The line is still owned by the State of Georgia from Atlanta to CT Tower in Chattanooga; it is leased by CSX Transportation.

The W&A Subdivision is a railroad line leased by CSX Transportation in the U.S. states of Tennessee and Georgia. The line runs from Chattanooga to Marietta, Georgia for a total of 119.1 miles. At its north end, it continues south from the Chattanooga Subdivision of the Nashville Division and at its south end, it continues south as the Atlanta Terminal Subdivision.

This line, originally built to 5 ft (1,524 mm) gauge, is famous because of the Great Locomotive Chase, also referred to as Andrews’ raid, which took place on the W&A during the American Civil War on the morning of April 12, 1862. -From Wikipedia