The CSX A Line forms the backbone of the historic Atlantic Coast Line Railroad Main Line, the backbone of their network in the southeastern United States. The main line runs from Richmond, Virginia to Port Tampa just southwest of Tampa, Florida, a distance of nearly 900 miles. Along its route it passes through Petersburg, Rocky Mount, Florence, Charleston, Savannah, Jacksonville, and Orlando. With the exception of a short 61-mile segment in Greater Orlando, the entire line is owned by CSX Transportation.