Tests have shown that installing electronically-controlled air brakes on North American freight trains brings significant benefits, including higher running speeds and increased fuel efficiency. This article shows how the Association of American Railroads (AAR) aims to complete its standard for these brakes by the end of 1996, so that phased implementation can begin in 1997. Without electronic control, the braking of a long train is still slow. To overcome this limitation and other problems, the AAR and several of its member railways have been testing freight trains equipped with Electronically Controlled Pneumatic (ECP) brakes, where conventional brake actuation valves are completely replaced by stand-alone computer-controlled, electronically-operated valve assemblies. The article compares various brake activating systems, lists ECP brake failure modes, compares ECP and conventional brake performance during trials, and describes AAR's implementation strategy.

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  • Corporate Authors:

    Reed Business Information, Limited

    Quadrant House, The Quadrant
    Brighton Road
    Sutton, Surrey  United Kingdom  SM2 5AS
  • Authors:
    • CARLSON, F G
    • PETERS, A J
  • Publication Date: 1996-9


  • English

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Filing Info

  • Accession Number: 00729746
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 26 1996 12:00AM