This article describes the new, innovative features of Southern Pacific's new yard at Colton, California. Master, intermediate, and group retarders perform a spacing function only. Tangent point retarders control coupling speeds. This separation of retarder functions is to make possible higher humping rates of six cars per minute or more. Eight classification tracks are combined into a 'key unit' with departure tracks. The layout of the yard provides an organized and rapid movement of cars with a minimum of conflicting or restriction points. The data-control systems uses two separate computer systems: the crest control computers (CCC) which is located at Colton and handles the switching and retardation of cars; and the terminal control computer (TCC) which is located at San Francisco and handles management information functions. The availability of real-time inventory and of a trains-due file permits advance planning on a detailed basis. Also available is computer-assisted assignment of resources, classification tracks, and departure tracks. Cost saving techniques used in construction of the yard include: distribution of cross ties by a tie-placer machine, prefabrication of turnouts, and welding of rail into long strings at a yard site.

  • Availability:
  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    350 Broadway
    New York, NY  United States  10014
  • Publication Date: 1972-11-13

Media Info

  • Features: Photos;
  • Pagination: 3 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00041229
  • Record Type: Publication
  • Source Agency: Railway Age
  • Files: TRIS
  • Created Date: Apr 2 1975 12:00AM