Column Generation for Multi-Matrix Blocking Problems

  • Robert Voll
  • Uwe Clausen
Conference paper
Part of the Operations Research Proceedings book series (ORP)


The blocking problem in railroad freight traffic is a tactical routing problem. The problem was modeled as an arc-based MIP in former publications. We reformulate the problem and introduce a new model. The modified objective function can be handled easier without loss of structural information. Nevertheless, real instances cannot be solved by standard algorithms. Therefore, we present a column generation approach. The model is reformulated in a path-based way. We exploit the new model structure in the pricing step. Sets of new paths for each relation are generated in polynomial time.


Column Generation Master Problem Feasible Path Restricted Master Problem Column Generation Approach 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institut fuer TransportlogistikTU DortmundDortmundGermany
  2. 2.Fraunhofer-Institut fuer Materialfluss und LogistikDortmundGermany

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