The Office of the Secretary (OST), within the Department of Transportation (DOT), has been given the responsibility of formulating national transportation policy and promoting intermodal transportation. Other responsibilities include negotiation and implementation of international transportation agreements, assuring the fitness of US airlines, enforcing airline consumer protection regulations, issuing regulations to prevent alcohol and illegal drug misuse in transportation systems, improving the security of the national transportation system, and preparing transportation legislation.
As part of its support function for DOT, OST is responsible for ensuring that employees and contractors receive the appropriate background checks, investigations, and security clearances. To help fulfill this need, OST uses a Web-enabled system, Investigations Tracking System (ITS). ITS records, tracks, and provides reporting on employee and contractor investigations pertaining to security background checks and clearances.