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This document is the third sub-report from the research project SATT(Samplanering av trafikp{\aa}verkande {\aa}tg\"arder och trafikfl\"oden,modellstudie / Coordinated planning of temporary capacity restrictions andtraffic flows, model study). The report summarizes the modelling alternativesthat have been considered. The main result of the model study is that wepropose a bi-level approach for handling the two parts of the problem, i.e. thescheduling of renewal projects and the subsequent adjustments of railwaytraffic flow. The contributions are: (1) a mixed integer formulation forscheduling project tasks, and (2) a network flow formulation for establishingthe possible volumes of railway traffic during the imposed capacityrestrictions of these project tasks. The intended usage of the model is foreconomical planning of a specific production year, which takes place before thetimetabling process starts. This document introduces the problem and gives afull description of (1) along with results from computational experiments thathave been conducted with this model. An accompanying report gives the detailsof the final formulation of (2).

An optimization model for renewal scheduling and traffic flow routing