A New Optimization Model For Railway Slot
Allocation
Author(s)
B. H. Park, S.-H. Hong & C.-S. Kim
Abstract
This study addresses a railway slot allocation model for the case of multiple
competing train operating companies (TOC). The auction-based mechanisms have
been studied by some researchers, to efficiently allocate the railway slots to TOCs.
But the use of such approaches requires the solving of the associated winner
determination problem, which can be modelled as a type of timetabling. We
consider the profit-maximizing slot allocation problem, where the profit is reduced
linearly depending on the deviation from the requested time. Our study suggests a
new optimization model based on path-flow variables in a time-space network and
a column generation approach using this formulation. The associated subproblem
of finding a new path then simply becomes one of finding a shortest path for each
requested slot. Compared to other approaches, our approach has the advantage of
easily reflecting combinatorial bids like AND or XOR bid. We also present the
experimental results applying our approach to a small network.
Keywords: railway slot, column generation, auction.
Keywords
railway slot, column generation, auction.
Related Book
Other papers in this volume
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