Zbornik radova Koridor 10 - Kirilo Savić

3rd International Scientific and Professional Conference
CORRIDOR 10 - a sustainable way of integrations
Operational planning for track work: Building new or maintaining existing infrastructure often causes
deteriorated conditions for train operation. The Timetable Manager evaluates and precisely locates the
resulting conflicts. The user can interactively alter the train schedule in accordance with the track work,
or reroute trains within the network. Any time penalties as well as the remaining train path options are
displayed in tabular or graphical form for trouble-free operations planning during track work.
5.2 Capacity Management (UIC code 406)
Capacity Management (UIC) enables you to calculate capacities in accordance with UIC code. For a
given timetable, a line section is chosen for which a compression of train paths should be performed.
The compression of the train paths within a line section is undertaken for a specified time period. Both
the line section and the time period are user definable. RailSys automatically compresses the utilised
train paths with consideration of the minimum headways. The result is the infrastructure occupation
time within the specified time period. Additional buffer time can be added for specifying a requested
operational quality. The occupation time and the buffer time add up to the over all time requirement
within the specified period. The quotient of the over all time requirement and the investigation period is
the relative capacity consumption. The capacity consumption represents the utilisation level of the
infrastructure and provides an indication of capacity constraints.
The remaining useable capacity of the line section can be identified by adding additional paths until
the specified time period is saturated with train paths and buffer times.
Capacity management for long time planning: The capacity calculation in accordance with the UIC
leaflet 406 is based on a timetable. However, most of the time the infrastructure providers can only
estimate the future traffic volume based on vague prognostic information. This information might be
insufficient for the creation of a timetable.
5.3 The compression of the train paths
The compression of the train paths within a line section is undertaken for a specified time period. Both
the line section and the time period are user definable. RailSys automatically compresses the utilised
train paths with consideration of the minimum headways.
By the "Method for train selection" it is possible to choose between the so-called DBmethod and the
ÖBB-method for the calculation of the interlinked level of occupation.
DB-method (see figure 4):
Start of the interlinked level of occupation:
- The train which entering time of the calculation step coincides as minimum with the
starting time of the defined calculation period is the first train. The timetable graph inside
of the calculation step must be completely within the calculation period (see in figure train
number 3).
- In the process of compression the first train (train number 3) is changed to the starting
time when entering the calculation step.
End of calculation period:
- The last train entering the section before the calculation period is over. The remaining
timetable graph may be outside of the calculation period (see fig. train number 4).
- The first train which is relevant for the calculation is copied and set behind the last train as
"Dummy train" (see in figure train D)
- When the process of compression has finished the occupation time is the result of the
difference between the starting time of the calculation period and the time beginning of the
first block section occupation of the "Dummy train".
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