Bi-Weekly Talk: Nadine Friesen: Modelling time in the railway network design problem

Wednesday, March 08, 2023, 10:30am

Location: RWTH Aachen University, Department of Computer Science - Ahornstr. 55, building E3, room 9u10

Speaker: Nadine Friesen



Due to long planning periods, the planning procedure for railway infrastructure starts long before the planning of the intended operation. Hence, the options for scheduling the trains in later steps are quite restricted as short-term infrastructure expansions are problematic. Therefore, each, usually expensive, modification should be done considering the unknown future demand as best as possible.

Here, we provide  a model for the network design problem for railway infrastructure under capacity constraints and uncertain timetables. We plan the infrastructure measures based on a strategic timetable to investigate the possibilities for adapting the traditional railway network design process to changing demands.
We minimize the expansion costs while respecting certain timetable constraints. We provide two models: First, we model the departure and arrival times as variables and secondly, we apply a time-expanded network.