- Title
- Creating schedules and computing operating costs for LTL load plans
- Creator
- Erera, Alan L.; Hewitt, Michael; Savelsbergh, Martin W. P.; Zhang, Yang
- Relation
- Computers & Operations Research Vol. 40, Issue 3, p. 691-702
- Publisher Link
- http://dx.doi.org/10.1016/j.cor.2011.10.001
- Publisher
- Pergamon Press
- Resource Type
- journal article
- Date
- 2013
- Description
- This paper presents a computational approach for creating an operational schedule for the tactical load plan used by a less-than-truckload (LTL) motor carrier. A load plan determines how freight is routed through an LTL carrier's linehaul terminal network by specifying a sequence of transfer terminals for all freight shipments, but does not provide a timed schedule of trailer, tractor, and driver dispatches required to operate the plan. Developing a detailed operational schedule allows one to more accurately estimate the likely cost of a given load plan, along with other important performance metrics. Given a load plan, the scheduling approach we develop creates loaded truck dispatches between terminals with specified time windows, and then creates cyclic driver schedules to cover all dispatches. A computational study using data from a large U.S. LTL carrier demonstrates that our technology produces schedules that accurately model operational costs, typically within 2% of actual reported costs.
- Subject
- transportation; less-than-truckload; cost estimation; integer programming; column generation
- Identifier
- http://hdl.handle.net/1959.13/1297235
- Identifier
- uon:19401
- Identifier
- ISSN:0305-0548
- Language
- eng
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