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Micro–macro transformation of railway networks

  • In this paper a bottom-up approach of automatic simplification of a railway network is presented. Starting from a very detailed, microscopic level, as it is used in railway simulation, the network is transformed by an algorithm to a less detailed level (macroscopic network), that is sufficient for long-term planning and optimization. In addition running and headway times are rounded to a pre-chosen time discretization by a special cumulative method, which we will present and analyse in this paper. After the transformation we fill the network with given train requests to compute an optimal slot allocation. Then the optimized schedule is re-transformed into the microscopic level and can be simulated without any conflicts occuring between the slots. The algorithm is used to transform the network of the very dense Simplon corridor between Swiss and Italy. With our aggregation it is possible for the first time to generate a profit maximal and conflict free timetable for the corridor across a day by a simultaneously optimization run.

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Author:Thomas Schlechte, Ralf BorndörferORCiD, Berkan Erol, Thomas Graffagnino, Elmar Swarat
Document Type:Article
Parent Title (English):Journal of Rail Transport Planning & Management
First Page:38
Last Page:48
Year of first publication:2011
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