Atlantic Coast Line Railroad ACL

The Atlantic Coast Line Railroad (reporting mark ACL) is a former U. S. Class I railroad from 1900 until 1967, when it merged with long-time rival Seaboard Air Line Railroad to form the Seaboard Coast Line Railroad. Much of the original ACL network has been part of CSX Transportation since 1986.

The Atlantic Coast Line served the Southeast, with a concentration of lines in Florida. Numerous named passenger trains were operated by the railroad for Florida-bound tourists, with the Atlantic Coast Line contributing significantly to Florida's economic development in the first half of the 20th century.

https://en.wikipedia.org/wiki/Atlantic_Coast_Line_Railroad