Micropile Design and Construction Guidelines - Paperbackby D Federal Highway Administration (Fhwa) (Created by) The Department of Transportation (USDOT or DOT) is a federal cabinet department of the United States government. The office's main concerns are those associated with transportation and transportation needs across the country. Established in 1967, the DOT is administered by the United States Secretary of Transportation. Some of the DOT's larger agencies include the Federal Aviation Administration