2190. Comparing macroscopic and microscopic modelling for railway timetable optimization
Invited abstract in session MA-59: Time tabling in public transportation, stream Transportation.
Monday, 8:30-10:00Room: Liberty 1.14
Authors (first author is the speaker)
| 1. | Inneke Van Hoeck
|
| Institute for Mobility - CIB, KU Leuven | |
| 2. | Carl Henrik Häll
|
| Dept of Science and Technology, Linköping University | |
| 3. | Anders Peterson
|
| Dept of Science and Technology, Linköping University | |
| 4. | Pieter Vansteenwegen
|
| Institute for Mobility - CIB, KU Leuven |
Abstract
Different levels of detail can be used to model a railway network when optimizing the timetable. While microscopic models are required to accurately represent the train operations, they are often quite complex and require long computation times. Therefore, macroscopic models are often used instead. Microscopic simulation is then used in a later stage to determine if the timetable is conflict-free. We consider a macroscopic, mesoscopic and microscopic network representation to assess which level of detail is most useful in practice in terms of the quality of the solution and the computation time. Specifically, we formulate mathematical models to optimize the timetable robustness for each of the representations and apply them to two case studies with very different properties: a line on the Swedish network and a bottleneck area of the Belgian network. For both cases, optimizing directly on the microscopic level leads to better solutions compared to optimizing with less details and solving the conflicts in a later stage. Regarding the computation times, the results show that, surprisingly, including more details does not always lead to longer computation times.
Keywords
- Railway Applications
Status: accepted
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