The main ERSAT EAV objective is to verify the suitability of EGNSS as the enabler of cost-efficient and economically sustainable ERTMS signalling solutions for safety railway applications.

The outcome of ERSAT-EAV is a priority for reusing the ERTMS standard architecture to satisfy the needs of the regional and local lines and for supporting the UNISIG Satellite Positioning Working Group that has been created (June 2012) to specify and standardize the application of the satellite positioning for the harmonization with the European ERTMS standard, by implementing and testing the solution on a pilot line as reference.