The mission of the Transportation Department is to "ensure our nation has the safest, most efficient and modern transportation system in the world; that improves the quality of life for all American people and communities, from rural to urban, and increases the productivity and competitiveness of American workers and businesses."
In this collection, you will find published materials produced by the the Federal Aviation Administration (FAA), Federal Highway Administration (FHWA), Maritime Administration (MARAD). Pipeline & Hazardous Materials Safety Administration (PHMSA).
Popular resources include FAA Safety Briefing print subscription and Air Traffic Control Handbook.