Zbornik radova Koridor 10 - Kirilo SaviÄ

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3rd International Scientific and Professional Conference CORRIDOR <strong>10</strong> - a sustainable way of integrations 5. RAILSYS – COMPUTER AIDED SUPPORT FOR CALCULATION OF RAILWAY CAPACITY 5.1 About RailSys software RailSys software is integrated management of timetable paths and infrastructure data for the entire planning and operations process. RailSys software has the following system components: - Infrastructure data management - Timetable construction/slot management - Track possession planning “run and construct” - Simulation - Print, evaluation and documentation Timetable design and construction: Complete train patterns for entire days are easily created with the Timetable Manager. The train routes are interactively specified within a network graph. RailSys automatically calculates and evaluates the running times, block occupation and conflicts with other trains networkwide as soon as a train is entered or edited. Assessment of the operational quality: The timetable works in theory No day is like another one in real life. Small and large perturbations cause delays. The Simulation Manager simulates a variety of operational days with realistic and individual delay characteristics. The Evaluation Manager supports the assessment of the simulation results. Various statistics provide dependable information about delays, resulting punctuality, or the quality of connections within the network, lines or stations. Infrastructure planning: The Infrastructure Manager is designed for accurately capturing, editing and managing all infrastructures of any size. Infrastructure can be entered as a draft. The comfortable editing functions allow for easy updates. Changing infrastructure designs are captured in multiple variants. The variants are used for timetable construction, possession planning, simulation and operational comparison of different planning stages with the Timetable and Simulation Manager. Belgrade, 2012 203
3rd International Scientific and Professional Conference CORRIDOR <strong>10</strong> - 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". Belgrade, 2012 204
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Zbornik radova Koridor 10 - Kirilo SaviÄ

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Zbornik radova Koridor 10 - Kirilo SaviÄ