The Seaboard Air Line Railroad (SAL) was a major American railroad that operated primarily in the southeastern United States. Founded in 1900, it connected key cities such as Richmond, Atlanta, and Miami, facilitating both passenger and freight transport. The railroad played a significant role in the economic development of the region. In 1967, the Seaboard Air Line Railroad merged with the Atlantic Coast Line Railroad to form the Seaboard Coast Line Railroad. This merger expanded its network and services, further enhancing transportation options in the southeastern U.S. The legacy of the SAL continues to influence rail transport in the region today.