The Airlines Reporting Corporation (ARC) regulates ticket sales and reports to the airlines for travel agencies and other ticket outlets and is a corporation owned by certain U.S. air carriers that collectively appoint U.S. travel agencies to represent participating air carriers.

The National Transportation Safety Board Bar Association is comprised of attorneys that practice before the United States National Transportation Safety Board (NTSB), the Federal Aviation Administration (FAA), and the Department of Transportation (DOT).

The National Highway Traffic Safety Administration (NHTSA) is responsible for reducing the number of deaths, injuries and economic losses resulting from motor vehicle crashes. The NHTSA sets and enforces safety performance standards for motor vehicles and motor vehicle equipment.

As a preventative measure for the protection of private transportation services, in 1987, the Federal Transit Administration (FTA) issued charter service rules to prevent public intrusion into private markets, and to make it possible for the private sector to utilize public transit resources to meet market needs.

The Federal Railroad Administration (FRA) promotes safe, environmentally sound, successful railroad transportation by developing policies and seeking investment in the infrastructure and technology for the rail system.

The Federal Maritime Commission (FMC) regulates the shipping and foreign trades of the United Statessince its formation in 1961 Prior to 1961, the FMC was part of U.S. Department of Commerce, and called the Federal Maritime Board. In 1961, it became . The FMC seeks to Protect shippers, carriers and others engaged in commerce outside of the U.S.

The Federal Highway Administration (FHWA) administers highway transportation activities including standards development, research and technology, training, technical assistance, highway access to federally owned lands and Indian lands, and commercial vehicle safety enforcement.