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State of the Practice: A Review of the Application of OR/MS in Freight Transportation

Author

Listed:
  • Michael F. Gorman

    (University of Dayton, Dayton, Ohio 45419)

  • John-Paul Clarke

    (Georgia Institute of Technology, Atlanta, Georgia 30332)

  • Amir Hossein Gharehgozli

    (Rotterdam School of Management, Erasmus University Rotterdam, 3062 PA Rotterdam, The Netherlands)

  • Michael Hewitt

    (Information Systems and Operations Management, Loyola University Chicago, Chicago, Illinois 60611)

  • René de Koster

    (Rotterdam School of Management, Erasmus University Rotterdam, 3062 PA Rotterdam, The Netherlands)

  • Debjit Roy

    (Indian Institute of Management Ahmedabad, Gujarat 380015, India)

Abstract

Freight transportation is an important part of the global supply chain. As distances shipped grow and supply chains become more complex and fragile, operations research (OR) can play an important role in improving the efficiency and robustness of supply networks. This article describes the state of the practice in OR and freight transportation, highlighting recent successful and widely used analytical techniques in oceanic transportation and port operations, and barge, freight rail, intermodal, truckload, less than truckload, and air freight transportation, as well as the use of OR techniques in third-party logistics.

Suggested Citation

  • 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.
    • Handle: RePEc:inm:orinte:v:44:y:2014:i:6:p:535-554
    DOI: 10.1287/inte.2014.0772
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    1. Sambracos, E. & Paravantis, J. A. & Tarantilis, C. D. & Kiranoudis, C. T., 2004. "Dispatching of small containers via coastal freight liners: The case of the Aegean Sea," European Journal of Operational Research, Elsevier, vol. 152(2), pages 365-381, January.
    2. Leo Kroon & Dennis Huisman & Erwin Abbink & Pieter-Jan Fioole & Matteo Fischetti & Gábor Maróti & Alexander Schrijver & Adri Steenbeek & Roelof Ybema, 2009. "The New Dutch Timetable: The OR Revolution," Interfaces, INFORMS, vol. 39(1), pages 6-17, February.
    3. Alan Erera & Michael Hewitt & Martin Savelsbergh & Yang Zhang, 2013. "Improved Load Plan Design Through Integer Programming Based Local Search," Transportation Science, INFORMS, vol. 47(3), pages 412-427, August.
    4. Hugo P. Simão & Jeff Day & Abraham P. George & Ted Gifford & John Nienow & Warren B. Powell, 2009. "An Approximate Dynamic Programming Algorithm for Large-Scale Fleet Management: A Case Application," Transportation Science, INFORMS, vol. 43(2), pages 178-197, May.
    5. Warren B. Powell & Belgacem Bouzaiene-Ayari & Coleman Lawrence & Clark Cheng & Sourav Das & Ricardo Fiorillo, 2014. "Locomotive Planning at Norfolk Southern: An Optimizing Simulator Using Approximate Dynamic Programming," Interfaces, INFORMS, vol. 44(6), pages 567-578, December.
    6. Robert C. Prior & Rob L. Slavens & Jerry Trimarco & Vedat Akgun & Edward G. Feitzinger & Chyi-Fu Hong, 2004. "Menlo Worldwide Forwarding Optimizes Its Network Routing," Interfaces, INFORMS, vol. 34(1), pages 26-38, February.
    7. Silke Jütte & Marc Albers & Ulrich W. Thonemann & Knut Haase, 2011. "Optimizing Railway Crew Scheduling at DB Schenker," Interfaces, INFORMS, vol. 41(2), pages 109-122, April.
    8. Rafael Epstein & Andres Neely & Andres Weintraub & Fernando Valenzuela & Sergio Hurtado & Guillermo Gonzalez & Alex Beiza & Mauricio Naveas & Florencio Infante & Fernando Alarcon & Gustavo Angulo & Cr, 2012. "A Strategic Empty Container Logistics Optimization in a Major Shipping Company," Interfaces, INFORMS, vol. 42(1), pages 5-16, February.
    9. John W. Braklow & William W. Graham & Stephen M. Hassler & Ken E. Peck & Warren B. Powell, 1992. "Interactive Optimization Improves Service and Performance for Yellow Freight System," Interfaces, INFORMS, vol. 22(1), pages 147-172, February.
    10. Andrew P. Armacost & Cynthia Barnhart & Keith A. Ware & Alysia M. Wilson, 2004. "UPS Optimizes Its Air Network," Interfaces, INFORMS, vol. 34(1), pages 15-25, February.
    11. Claudia R. Rosales & Michael J. Fry & Rajesh Radhakrishnan, 2009. "Transfreight Reduces Costs and Balances Workload at Georgetown Crossdock," Interfaces, INFORMS, vol. 39(4), pages 316-328, August.
    12. Lai, Yung-Cheng & Barkan, Christopher P.L. & Önal, Hayri, 2008. "Optimizing the aerodynamic efficiency of intermodal freight trains," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 44(5), pages 820-834, September.
    13. Kevin C. Furman & Jin-Hwa Song & Gary R. Kocis & Michael K. McDonald & Philip H. Warrick, 2011. "Feedstock Routing in the ExxonMobil Downstream Sector," Interfaces, INFORMS, vol. 41(2), pages 149-163, April.
    14. Teodor Gabriel Crainic & Nicoletta Ricciardi & Giovanni Storchi, 2009. "Models for Evaluating and Planning City Logistics Systems," Transportation Science, INFORMS, vol. 43(4), pages 432-454, November.
    15. Ravindra K. Ahuja & Jian Liu & James B. Orlin & Dushyant Sharma & Larry A. Shughart, 2005. "Solving Real-Life Locomotive-Scheduling Problems," Transportation Science, INFORMS, vol. 39(4), pages 503-517, November.
    16. Warren B. Powell & Yosef Sheffi, 1989. "OR Practice—Design and Implementation of an Interactive Optimization System for Network Design in the Motor Carrier Industry," Operations Research, INFORMS, vol. 37(1), pages 12-29, February.
    17. Bierwirth, Christian & Meisel, Frank, 2010. "A survey of berth allocation and quay crane scheduling problems in container terminals," European Journal of Operational Research, Elsevier, vol. 202(3), pages 615-627, May.
    18. Warren B. Powell & Arun Marar & Jack Gelfand & Steve Bowers, 2002. "Implementing Real-Time Optimization Models: A Case Application From The Motor Carrier Industry," Operations Research, INFORMS, vol. 50(4), pages 571-581, August.
    19. Kroon, L.G. & Huisman, D. & Abbink, E.J.W. & Fioole, P-J. & Fischetti, M. & Maróti, G. & Schrijver, A. & Steenbeek, A. & Ybema, R., 2008. "The new Dutch timetable: The OR revolution," Econometric Institute Research Papers EI 2008-19, Erasmus University Rotterdam, Erasmus School of Economics (ESE), Econometric Institute.
    20. Michael F. Gorman & Dharma Acharya & David Sellers, 2010. "CSX Railway Uses OR to Cash In on Optimized Equipment Distribution," Interfaces, INFORMS, vol. 40(1), pages 5-16, February.
    21. John J. Bartholdi & Kevin R. Gue, 2000. "Reducing Labor Costs in an LTL Crossdocking Terminal," Operations Research, INFORMS, vol. 48(6), pages 823-832, December.
    22. Luo, Sirong & Çakany?ld?r?m, Metin & Kasilingam, Raja G., 2009. "Two-dimensional cargo overbooking models," European Journal of Operational Research, Elsevier, vol. 197(3), pages 862-883, September.
    23. Katta G. Murty & Yat-wah Wan & Jiyin Liu & Mitchell M. Tseng & Edmond Leung & Kam-Keung Lai & Herman W. C. Chiu, 2005. "Hongkong International Terminals Gains Elastic Capacity Using a Data-Intensive Decision-Support System," Interfaces, INFORMS, vol. 35(1), pages 61-75, February.
    24. Marielle Christiansen & Kjetil Fagerholt & David Ronen, 2004. "Ship Routing and Scheduling: Status and Perspectives," Transportation Science, INFORMS, vol. 38(1), pages 1-18, February.
    25. Chris Groër & Bruce Golden & Edward Wasil, 2009. "The Consistent Vehicle Routing Problem," Manufacturing & Service Operations Management, INFORMS, vol. 11(4), pages 630-643, February.
    26. Hugo P. Simão & Abraham George & Warren B. Powell & Ted Gifford & John Nienow & Jeff Day, 2010. "Approximate Dynamic Programming Captures Fleet Operations for Schneider National," Interfaces, INFORMS, vol. 40(5), pages 342-352, October.
    27. Michael F. Gorman, 2010. "Hub Group Implements a Suite of OR Tools to Improve Its Operations," Interfaces, INFORMS, vol. 40(5), pages 368-384, October.
    28. Ravindra K. Ahuja & Krishna C. Jha & Jian Liu, 2007. "Solving Real-Life Railroad Blocking Problems," Interfaces, INFORMS, vol. 37(5), pages 404-419, October.
    29. Dekker, Rommert & Bloemhof, Jacqueline & Mallidis, Ioannis, 2012. "Operations Research for green logistics – An overview of aspects, issues, contributions and challenges," European Journal of Operational Research, Elsevier, vol. 219(3), pages 671-679.
    30. Andreea Popescu & Earl Barnes & Ellis Johnson & Pinar Keskinocak, 2013. "Bid Prices When Demand Is a Mix of Individual and Batch Bookings," Transportation Science, INFORMS, vol. 47(2), pages 198-213, May.
    31. Norma Welch & James Gussow, 1986. "Expansion of Canadian National Railway’s Line Capacity," Interfaces, INFORMS, vol. 16(1), pages 51-64, February.
    32. Hong Kam Lo & McCord, Mark R. & Wall, Cori K., 1991. "Value of ocean current information for strategic routing," European Journal of Operational Research, Elsevier, vol. 55(2), pages 124-135, November.
    33. Kuby, Michael J. & Gray, Robert Gordon, 1993. "The hub network design problem with stopovers and feeders: The case of Federal Express," Transportation Research Part A: Policy and Practice, Elsevier, vol. 27(1), pages 1-12, January.
    34. Albert Veenstra & Rob Zuidwijk & Eelco van Asperen, 2012. "The extended gate concept for container terminals: Expanding the notion of dry ports," Maritime Economics & Logistics, Palgrave Macmillan;International Association of Maritime Economists (IAME), vol. 14(1), pages 14-32, March.
    35. Boysen, Nils & Fliedner, Malte, 2010. "Determining crane areas in intermodal transshipment yards: The yard partition problem," European Journal of Operational Research, Elsevier, vol. 204(2), pages 336-342, July.
    36. J-G Kang & Y-D Kim, 2002. "Stowage planning in maritime container transportation," Journal of the Operational Research Society, Palgrave Macmillan;The OR Society, vol. 53(4), pages 415-426, April.
    37. Gharehgozli, A.H. & Roy, D. & de Koster, M.B.M., 2014. "Sea Container Terminals," ERIM Report Series Research in Management ERS-2014-009-LIS, Erasmus Research Institute of Management (ERIM), ERIM is the joint research institute of the Rotterdam School of Management, Erasmus University and the Erasmus School of Economics (ESE) at Erasmus University Rotterdam.
    38. Edward J Sheppard & David Seidman, 2001. "Ocean Shipping Alliances: The Wave of the Future?," Maritime Economics & Logistics, Palgrave Macmillan;International Association of Maritime Economists (IAME), vol. 3(4), pages 351-367, December.
    39. Roy, D. & Gupta, A. & Parhi, S. & de Koster, M.B.M., 2014. "Optimal Stack Layout in a Sea Container Terminal with Automated Lifting Vehicles," ERIM Report Series Research in Management ERS-2014-012-LIS, Erasmus Research Institute of Management (ERIM), ERIM is the joint research institute of the Rotterdam School of Management, Erasmus University and the Erasmus School of Economics (ESE) at Erasmus University Rotterdam.
    40. Yung-Cheng Lai & Yanfeng Ouyang & Christopher P. L. Barkan, 2008. "A Rolling Horizon Model to Optimize Aerodynamic Efficiency of Intermodal Freight Trains with Uncertainty," Transportation Science, INFORMS, vol. 42(4), pages 466-477, November.
    41. James R. Kroes & Yuwen Chen & Paul Mangiameli, 2013. "Estimating Demand for Container Freight Service at the Port of Davisville," Interfaces, INFORMS, vol. 43(2), pages 170-181, April.
    42. Xiao, Baichun & Yang, Wei, 2010. "A revenue management model for products with two capacity dimensions," European Journal of Operational Research, Elsevier, vol. 205(2), pages 412-421, September.
    43. Fagerholt, Kjetil & Lindstad, Håkon, 2000. "Optimal policies for maintaining a supply service in the Norwegian Sea," Omega, Elsevier, vol. 28(3), pages 269-275, June.
    44. Pak, K. & Dekker, R., 2004. "Cargo Revenue Management: Bid-Prices for a 0-1 Multi Knapsack Problem," ERIM Report Series Research in Management ERS-2004-055-LIS, Erasmus Research Institute of Management (ERIM), ERIM is the joint research institute of the Rotterdam School of Management, Erasmus University and the Erasmus School of Economics (ESE) at Erasmus University Rotterdam.
    45. Tatsiana Levina & Yuri Levin & Jeff McGill & Mikhail Nediak, 2011. "Network Cargo Capacity Management," Operations Research, INFORMS, vol. 59(4), pages 1008-1023, August.
    46. Halit Üster & Panitan Kewcharoenwong, 2011. "Strategic Design and Analysis of a Relay Network in Truckload Transportation," Transportation Science, INFORMS, vol. 45(4), pages 505-523, November.
    47. Phil Ireland & Rod Case & John Fallis & Carl Van Dyke & Jason Kuehn & Marc Meketon, 2004. "The Canadian Pacific Railway Transforms Operations by Using Models to Develop Its Operating Plans," Interfaces, INFORMS, vol. 34(1), pages 5-14, February.
    48. Ahmad I. Jarrah & Ellis Johnson & Lucas C. Neubert, 2009. "Large-Scale, Less-than-Truckload Service Network Design," Operations Research, INFORMS, vol. 57(3), pages 609-625, June.
    49. Stéphane Dauzère-Pérès & Atle Nordli & Asmund Olstad & Kjetil Haugen & Ulrich Koester & Myrstad Per Olav & Geir Teistklub & Alf Reistad, 2007. "Omya Hustadmarmor Optimizes Its Supply Chain for Delivering Calcium Carbonate Slurry to European Paper Manufacturers," Interfaces, INFORMS, vol. 37(1), pages 39-51, February.
    50. Thomas A. Feo & José Luis González-Velarde, 1995. "The Intermodal Trailer Assignment Problem," Transportation Science, INFORMS, vol. 29(4), pages 330-341, November.
    51. Andreea Popescu & Pinar Keskinocak & Ellis Johnson & Mariana LaDue & Raja Kasilingam, 2006. "Estimating Air-Cargo Overbooking Based on a Discrete Show-Up-Rate Distribution," Interfaces, INFORMS, vol. 36(3), pages 248-258, June.
    52. Hein Fleuren & Chris Goossens & Marco Hendriks & Marie-Christine Lombard & Ineke Meuffels & John Poppelaars, 2013. "Supply Chain–Wide Optimization at TNT Express," Interfaces, INFORMS, vol. 43(1), pages 5-20, February.
    53. Amar Kumar Narisetty & Jean-Philippe P. Richard & David Ramcharan & Deby Murphy & Gayle Minks & Jim Fuller, 2008. "An Optimization Model for Empty Freight Car Assignment at Union Pacific Railroad," Interfaces, INFORMS, vol. 38(2), pages 89-102, April.
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