Evaluating the robustness of a railway timetable : a practical approach
Faculty of Applied Economics
S.l. , 2013
Proceedings of the 5th International Seminar on Railway Operations Modelling and Analysis (RailCopenhagen 2013), Technical University of Denmark, May 13-15, 2013
University of Antwerp
With the growing traffic density in modern railway networks, robustness of a timetable becomes very important. In a railway network environment, robustness is related to the resistance to delays. More specifically, the manner in which the timetable can cope with primary delays is determined by its robustness. In this paper, we have developed a method to measure the robustness of a given timetable. This method takes into account propagation of delays in the network as well as the recovery from larger than normal delays. By efficiently aggregating the results, this method makes it possible to compare the robustness of timetables in different regions. An important advantage is that the proposed method can be applied on both a macroscopic and microscopic level and is tool independent. Therefore, other railway operators can adopt this method without being obliged to modify their existing tools. To present the merits of our approach, with the help of two simulators, namely a macroscopic tool OnTime and a microscopic tool LUKS, we have compared the robustness of two timetables for different regions in Belgium. The results show that the proposed method allows us to compare the robustness of different timetables in an intuitive, yet general, way.