Technical Reports

High Cant Deficiency Operation of the Talgo Train on the Pacific Northwest Corridor

  • 01
  • Mar
  • 1999
AUTHOR: E.T. Sherrock, B.T. Whitten
KEYWORDS: Talgo Train, Burlington Northern Santa Fe Railway, Tilting Passenger Cars, Cant Deficiencies
ABSTRACT: The U.S. Federal Railroad Administration (FRA), Amtrak, the Burlington Northern Santa Fe Railway (BNSF) and the Departments of Transportation for the states of Washington and Oregon, in an effort to improve rail passenger service on the Pacific Northwest Corridor, have initiated a co-operative program to reduce travel time between Portland, Oregon, and Blain, Washington that is competitive with other modes of transportation. The approach taken for reducing trip time is to maintain the maximum authorized speed for the rote of 79 mph but to minimize speed reductions in curves by operating at higher can deficiencies. One aspect of the program is the use of the Talgo train, with its tilting passenger cars, to provide increased passenger comfort and accommodate higher speeds and cant deficiencies in curves. Under rules applicable at program inception, Amtrak petitioned the FRA to grant a temporary waiver of compliance to test a Talgo train at curve speeds producing up to eight inches of cant deficiency. The FRA approved Amtrak's petition, docketed H-97-3, for the purpose of test and demonstration, subject to several conditions, included pre-revenue tests runs to be conducted over the proposed track section to evaluate the vehicle/track interaction response of each Talgo train vehicle type, including the selected locomotives.