Article | RailNorrköping 2019. 8th International Conference on Railway Operations Modelling and Analysis (ICROMA), Norrköping, Sweden, June 17th – 20th, 2019 | Studies on the validity of the fixed-speed approximation for the real time Railway Traffic Management Problem Linköping University Electronic Press Conference Proceedings
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Title:
Studies on the validity of the fixed-speed approximation for the real time Railway Traffic Management Problem
Author:
Pierre Hosteins: Univ Lille Nord de France, IFSTTAR, COSYS, ESTAS, France Paola Pellegrini: Univ Lille Nord de France, IFSTTAR, COSYS, LEOST, France Joaquin Rodriguez: Univ Lille Nord de France, IFSTTAR, COSYS, ESTAS, France
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Full text (pdf)
Year:
2019
Conference:
RailNorrköping 2019. 8th International Conference on Railway Operations Modelling and Analysis (ICROMA), Norrköping, Sweden, June 17th – 20th, 2019
Issue:
069
Article no.:
027
Pages:
409-424
No. of pages:
16
Publication type:
Abstract and Fulltext
Published:
2019-09-13
ISBN:
978-91-7929-992-7
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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In railway traffic management problems, a frequent approximation is the one of fixed-speed, i.e. the trains either run at their cruise speed or are stopped immediately without considering the acceleration and deceleration phases due to arising conflicts on the infrastructure. We assess the validity of the fixed-speed approximation for train speed dynamics in the real time Railway Traffic Management Problem. This is done through a statistical analysis on a number of perturbed scenarios on different railway infrastructures, for different objective functions commonly used in the literature. For each scenario, we analyze the ranking of the generated solutions both in the fixed-speed approximation, obtained by solving the optimization model, and with the variable-speed dynamics, obtained through micro simulation with the OpenTrack software. Our results indicate that some objective functions can be considered reliable when used in conjunction with the fixed-speed approximation, while others require more detailed studies. We also propose a modi?ed fixed-speed approximation to better reflect the behaviour of trains speed dynamics and study its efficiency.

Keywords: Traffic Management, speed profile, fixed-speed approximation, Mathematical Programming, optimization

RailNorrköping 2019. 8th International Conference on Railway Operations Modelling and Analysis (ICROMA), Norrköping, Sweden, June 17th – 20th, 2019

Author:
Pierre Hosteins, Paola Pellegrini, Joaquin Rodriguez
Title:
Studies on the validity of the fixed-speed approximation for the real time Railway Traffic Management Problem
References:
No references available

RailNorrköping 2019. 8th International Conference on Railway Operations Modelling and Analysis (ICROMA), Norrköping, Sweden, June 17th – 20th, 2019

Author:
Pierre Hosteins, Paola Pellegrini, Joaquin Rodriguez
Title:
Studies on the validity of the fixed-speed approximation for the real time Railway Traffic Management Problem
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Last updated: 2019-11-06