The Italian approach on GNSS Train Control and Management systems, Challenges for a Global Service
Alberto Tuozzi ; Claudia Facchinetti ; Luigi Ansalone ; et al.
Sep - 2017

Event Title : 68th International Astronautical Congress 2017
Published in: IAC Paper
Publisher: IAF
type: Conference Proceedings

66th International Astronautical Congress 2015SPACE COMMUNICATIONS AND NAVIGATION SYMPOSIUM (B2)Space-Based Navigation Systems and Services (3)Author: Mr. Alberto TuozziASI - Italian Space Agency, Italy, alberto.tuozzi@asi.itDr. Claudia FacchinettiItalian Space Agency (ASI), Italy, claudia.facchinetti@asi.itDr. Luigi AnsaloneAgenzia Spaziale Italiana (ASI), Italy, luigi.ansalone@est.asi.itMr. Francesco RispoliItaly, franscesco.rispoli@ansaldo-sts.comTHE ITALIAN APPROACH ON GNSS TRAIN CONTROL AND MANAGEMENT SYSTEMS,CHALLENGES FOR A GLOBAL SERVICEAbstractIn the transportation field, the rail and maritime GNSS applications are benefitting from the Safetyof Life applications already certified in the aviation field and a preliminary roadmap for the adoption ofEGNOS and GALILEO is being pursued. One of the main challenge for the adoption of GNSS is theability to meet the Tolerable Hazard Rate of 10E-8/hour required by the odometer function of EuropeanTrain Control Systems (ERTMS-ETCS). This requirement is more stringent respect to aviation and aproper dependability analysis is necessary in terms of “Accuracy, integrity, continuity, and Availability”of the GNSS performance in the rail environment. Compatibility of the GNSS performance with traincontrol systems would ensure the modernization of local lines in Europe, making them more efficient andsafer in a favorable environment to attract investments. In this way, the existing multi-constellations,the wide and local augmentation networks would help the development of new applications in the railtransport and competitiveness improvement.The use of GNSS systems to eliminate the track circuitry and to reduce the operational costs arerecommended for the European regional and local rail lines for passengers, representing about 50A uniquetest bed at regional level is being developed in Italy, with the aim of verification, validation and certificationof new procedures, standards, requirements and performance of the GNSS system in the ERTMS-ETCSecosystem. EGNOS is strategic to ensure interoperability with ERTMS system, while GALILEO isstrategic to achieve independence, global reach and desired performance. The basic idea is to replacephysical infrastructures like the Balises, for the exact train position, with a Virtual Balises, through theuse of the GNSS systems and other sensors, may ensure the optimal positioning of the train, the trackoccupancy and the train integrity at lower costs and increasing safety. Other advantages derive from thereduced exposure to vandalisms, thefts, etc. and by the improved safety for freights. This article aimsto highlight the potential benefits of the GNSS application for the European train Control System andto describe the innovation projects supported by ASI to verify the technology in Italy and to present theachievements of the projects currently active in this area.

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