Ad hoc-processen: hur används ledig kapacitet i järnvägsnätet?

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Joakim Ahlberg

After the Swedish Transport Administration’s adoption of next year's timetable in mid-fall each year, starts the so-called ad hoc process, i.e. requests for train paths that can use spare capacity in the network. VTI received in September 2015 Transport Agency's mission to deepen the understanding of the ad hoc-process, This “notat” reports that assignment. In light of the description that was made, the intention was to also find the measure of the importance of this process in relation to the process leading to adopting a final schedule. It has been found that the Transport Administration’s various information management systems are not designed to enable such a description.

Thanks to a recent statistical tool, it is possible to observe that nearly 97 percent of the passenger trains booked into the annual timetable process, also actually run. This refers to two thirds of the timetable year 2015. The aim of the Transport Agency/Traffic analysis is to, in the near future, also report similar information about freight train. Behind this figure conceals both an outflow and an inflow of traffic that will be conducted in accordance with the timetable set out in the autumn of each year. However, there is no knowledge of when these changes are implemented, which is of great importance for assessing the degree of flexibility in the ad hoc process. This situation may change as a result of the Transport Agency as of the timetable relating to 2016 for the charges to cancel the allocated capacity. The fee will be higher the closer to the scheduled departure of the train the application is withdrawn. This can help improve the flexibility in the use of the track capacity not reserved in the annual timetabling process. Another consequence may be that the information on the process will improve.

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