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Minimizing Trailer-on-Flat-Car Costs: A Network Optimization Model

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  • Robert B. Dial

    (Volpe National Transportation Systems Center, Cambridge, Massachusetts 02142)

Abstract

This paper discusses the mathematical and computational underpinnings of an optimization model that reduces United Parcel Service, Inc.'s trailer-on-flat-car (TOFC) usage costs by $4 million per year. It includes an informal statement of the TOFC problem, an integer linear program (ILP) formulation, and a transformation of this ILP into a pure minimum cost network flow program, whose software implementation provides the TOFC planner with a rich set of practical features.

Suggested Citation

  • Robert B. Dial, 1994. "Minimizing Trailer-on-Flat-Car Costs: A Network Optimization Model," Transportation Science, INFORMS, vol. 28(1), pages 24-36, February.
    • Handle: RePEc:inm:ortrsc:v:28:y:1994:i:1:p:24-36
    DOI: 10.1287/trsc.28.1.24
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    Cited by:

    1. Alexandra M. Newman & Candace Arai Yano, 2000. "Scheduling Direct and Indirect Trains and Containers in an Intermodal Setting," Transportation Science, INFORMS, vol. 34(3), pages 256-270, August.
    2. Dial, Robert B., 2000. "Minimal-revenue congestion pricing Part II: An efficient algorithm for the general case," Transportation Research Part B: Methodological, Elsevier, vol. 34(8), pages 645-665, November.

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