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Definition: Association of American Railroads
AAR is an industry trade group created on 12th October, 1934. It is formed majorly to represent the major railroads of North America, Amtrak and some regional commuters. It was formed by merging 5 industry bodies which were responsible for railroads executives, Accounting and treasury officers etc. It is headquartered in Washington, DC. It has subsidiaries that perform functions integral for the North American railroad network.
It has various systems such as Umler and Embargoes system which provides crucial services and supports equipment owners, railroad network and supplier for the integral information. Another subsidiary Transport Technology Center is controlled by Department of Transportation and aids the testing of railroad track and loco components and safety devices.
Besides supporting railroad industry technologically, AAR represents the interests of its members (railroad companies) to the Congress and public. Other major function of AAR is to improve the safety of the railroad industry and works on development of equipment to improve safety standards.