Office of the Secretary of Transportation

The Office of the Secretary of Transportation (OST) is the main part of the U.S. Department of Transportation responsible for overseeing federal transportation policies, programs, and regulations. It provides leadership and direction for all transportation modes—such as aviation, highways, rail, and maritime—ensuring efficient, safe, and accessible travel. The OST advises the Secretary of Transportation, develops transportation initiatives, and manages relationships with other government agencies and stakeholders. Essentially, it acts as the central hub for shaping and implementing federal transportation priorities to support economic growth and public safety.