ProjectFramtidens Leveranstågplaneprocess

Business Areas
Framtidens Leveranstågplaneprocess

The 2014 finalised timetable for Sweden has 314 unique operation days, i.e. 314 days with a unique traffic pattern. Despite this, the finalised timetable generally provides only one conflict resolved train path for each train, and this train path is supposed to be realised for all operation days. Further, once the yearly timetable has been finalised the train path may not be changed.

Rather than finalising entire train paths only certain characteristics of a train path, called
delivery commitments, could be finalised. Delivery commitments could e.g. be arrival and departure times at important locations or the total running time, depending on the needs of the train operator. By allowing trains to have multiple train paths the infrastructure capacity could be used more efficiently, and later planning processes could be more flexible.

In this project we investigate methods for generating delivery commitments that exploit the uniqueness of operations days to achieve a more efficient use of infrastructure while also ensuring that the delivery commitments can be fufilled each day of operation.

Currently our main method for generating delivery commitments is based on analysing a yearlong
timetable, called the control timetable. The control timetable is constructed using rolling horizon planning and a MIP-model that optimises the train paths for each day individually. Further, different train path characteristics are optimized for different operators. As each and every day is planned for individually a train may have many train paths in the control timetable, and the delivery commitments are set by analysing the characteristics of this set of train paths.