The United States Department of Transportation (USDOT or just DOT) is a federal Cabinet department of the United States government concerned with transportation. It was established by an act of Congress on October 15, 1966 and began operation on April 1, 1967. It is administered by the United States Secretary of Transportation.
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.