A network flow model has been prepared which determines an optimal routing of railcars over the Canadian Pacific Rail System. A demonstration run of this model has been performed using a CDC 6600 computer. The network used in the demonstration has 26 yards and 41 connecting track segments. A table of demands for movement of loaded rail cars from each yard to each other was obtained historically. Component models describe the time delay due to (a) inspection and classification; (b) assembly and outbound inspection; (c) over-the-road transit, switching delays and station working time. Time effects of congestion enter chiefly through a classification queue, a train assembly bulk queue, and the meet and overtake delays due to the interaction between passenger trains, through freights and way freights on a single-track line. Detailed modelling of the network structure allows bypass operation with pickups and setoffs, and sharing of common single tracks by various types and routings of trains. Results show the flows in railcars per day that minimize total flow-time in car-minutes over the entire system. Also various items of travel time data within yards and over the road are provided.

  • Supplemental Notes:
    • This work was supported under CIGGT Project 5.10.
  • Corporate Authors:

    Canadian Institute of Guided Ground Transport

    Queen's University
    Kingston, Ontario K7L 3N6,   Canada 
  • Authors:
    • Fullerton, H V
  • Publication Date: 1972-1

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 44 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00141133
  • Record Type: Publication
  • Source Agency: Canadian Institute of Guided Ground Transport
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM