Abstract
Railway track irregularities have to be kept at a satisfactory level by taking appropriate maintenance activities on the ballasted track. This paper aims at obtaining an optimal maintenance schedule for the railway track irregularities using all-integer type linear programming model. In order to determine an effective maintenance strategy, we develop a mathematical programming model to make an optimal schedule for the multiple tie tamper (MTT) operation aiming at the largest improvements for the level of surface irregularities reflecting high riding quality and safety for the railway vehicles. We apply our optimization modeling approach to the actual Japanese railway network system, then confirm that our model is effective and useful enough for the practical use.
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