Optimal track class assignment for a railroad network

Lai Y-C, M Dingler, Lin S-Y and Liu K-C
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Lai Y-C: National Taiwan University, Taipei, Taiwan
M Dingler: University of Illinois at Urbana-Champaign, Urbana, USA
Lin S-Y: National Taiwan University, Taipei, Taiwan
Liu K-C: National Taiwan University, Taipei, Taiwan

Journal of the Operational Research Society, 2013, vol. 64, issue 12, 1800-1809

Abstract: The track class and speed for North American railroads are governed by regulations from the Federal Railroad Administration. Better quality of track permits greater operational speeds and lower transportation cost but also requires greater maintenance expenditure. In this study, we considered the trade-off between maintenance and transportation costs, and developed an optimization framework determining the optimal assignment for track class based upon the characteristics of the track, traffic demand, and maintenance budget. We also presented a solution algorithm by using Lagrangian Relaxation techniques to improve the solution efficiency. This tool can help railroads maintain tracks at their most appropriate level so as to provide reliable and cost-effective services.

Date: 2013
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