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Expansion of Canadian National Railway’s Line Capacity

Author

Listed:
  • Norma Welch

    (Operations Research, CN Rail, PO Box 8100, Montreal, Quebec, Canada H3C 3N4)

  • James Gussow

    (Transportation Planning, CN Rail)

Abstract

In the late 1970s, traffic volumes over the next decade were predicted to double on Canadian National Railway’s already congested single track main line. As part of a plant expansion program, a transportation planning research team developed two “what-if” simulation models to evaluate the relative effect of the many factors influencing main line capacity. When used together, they predict train delay under various track and signal designs, operating methods, and traffic scenarios. We then proposed a package of cost-effective improvements for capacity expansion, which included closely spaced intermediate signals and strategically located sections of double track. These improvements, together with the application of the simulation models to plant design, have enabled CN to defer capital expenditures of over C$350 million beyond the 1980s.

Suggested Citation

  • Norma Welch & James Gussow, 1986. "Expansion of Canadian National Railway’s Line Capacity," Interfaces, INFORMS, vol. 16(1), pages 51-64, February.
    • Handle: RePEc:inm:orinte:v:16:y:1986:i:1:p:51-64
    DOI: 10.1287/inte.16.1.51
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    Cited by:

    1. Michael F. Gorman & John-Paul Clarke & Amir Hossein Gharehgozli & Michael Hewitt & René de Koster & Debjit Roy, 2014. "State of the Practice: A Review of the Application of OR/MS in Freight Transportation," Interfaces, INFORMS, vol. 44(6), pages 535-554, December.
    2. Li, Feng & Gao, Ziyou & Wang, David Z.W. & Liu, Ronghui & Tang, Tao & Wu, Jianjun & Yang, Lixing, 2017. "A subjective capacity evaluation model for single-track railway system with δ-balanced traffic and λ-tolerance level," Transportation Research Part B: Methodological, Elsevier, vol. 105(C), pages 43-66.

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