two other little-used branch lines from the extension. By aggressive marketing and technological innovations that drew travelers to the line, such as the highly popular Silver Meteor streamliner, introduced in 1939, Seaboard managed to regain its financial footing. The economic boom of World War II also helped replenish the railroad's coffers. In 1944, the Silver Meteor alone turned a profit of over $8 million, nearly as much as the deficit of the whole railroad had been in the Depression year of 1933. In May 1945, all of the Seaboard properties were sold under foreclosure at an auction sale to bondholders for $52 million. In 1946, the railroad was reorganized as the Seaboard Air Line Railroad. Later 20th century Quick to recognize the cost savings of diesel power over steam in the postwar period, the Seaboard dieselized all of its mainline trains by 1953. In the same decade, the railroad installed CTC signaling across most of its system, generating further savings of time and money, as well as improved safety. However, like all American railroads, Seaboard saw a decline in revenues, especially in passenger traffic, from the 1950s into the 1960s, in the face of growing competition from airlines, trucking companies and the Interstate Highway System. In 1960 SAL reported 9910 million net ton-miles of revenue freight and 484 million passenger-miles, not including Gainesville Midland and Tavares & Gulf. As a strategic move to reduce costs and counter the competition of airlines and trucking companies, merger with the parallel system of Seaboard's chief rival, Atlantic Coast Line Railroad (ACL) was first proposed in 1958, but was not approved by the Interstate Commerce Commission until 1967. On July 1 of that year, SAL and ACL merged to form Seaboard Coast Line Railroad (SCL). The seeming redundancy of the name stems from combining the most common short forms of the two railroads' names: the public and the railroads themselves for many years had referred to SAL as "Seaboard" and ACL as "Coast Line." On May 1, 1971, SCL turned over all its passenger operations to the newly formed Amtrak, which continued to operate the profitable Silver Meteor and Silver Star alongside a former Coast Line streamliner, the Champion, while eliminating others. By 1972, Seaboard Coast Line and its corporate relatives Louisville and Nashville, Georgia Railroad, Atlanta and West Point Railroad, Western Railway of Alabama and Clinchfield Railroad began advertising themselves as the Family