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The transport sector requires efficient and accurate traffic management systems in airspace, on land and at sea. European Geostationary Navigation Overlay Service (EGNOS) may be part of these systems. However admission to its use in Poland requires analysis whether it fulfil international standards. This paper presents such verification of the EGNOS usefulness for: air, sea, road and rail Polish transport. Therefore, conducted a characterization and analysis of four parameters of the signal (accuracy, integrity, continuity and availability) based on data from the EGNOS Data Collection Network in the years 2011-2012. Monitored parameters were compared with current international requirements for the signals of satellite systems in force in the various types of transport. This allowed to determine whether the EGNOS system can be used in them.