The Department of Transportation was established by an act of Congress on October 15, 1966, the Department's first official day of operation was April 1, 1967. The mission of the department is to serve the United States by ensuring a fast, safe, efficient, accessible and convenient transportation system that meets our vital national interests and enhances the quality of life of the American people, today and into the future.
The Secretary of Transportation is the principal adviser to the president in all matters relating to federal transportation programs. The secretary is assisted by the Deputy Secretary in this role. The Office of the Secretary (OST) oversees the formulation of national transportation policy and promotes intermodal transportation. Other responsibilities range from negotiation and implementation of international transportation agreements, assuring the fitness of U.S. airlines, enforcing airline consumer protection regulations, issuance of regulations to prevent alcohol and illegal drug misuse in transportation systems and preparing transportation legislation.
Transports ... that the transport numbers are based on the designations listed in Secretary of War Alger's account. This is the only comprehensive list. However, various accounts give conflicting accounts of transport numerical designations. If you have ... http://www.spanamwar.com/transports.htm