The current authorisation process for placing into service rail vehicles according to Technical Specifications for Interoperability and national safety rules is a very long and costly process. The Technical Specifications for Interoperability (TSI) provide common regulations for the placing in service of rail vehicle, when such common understanding and harmonized rules exist. This is not the case for Electromagnetic Compatibility between rail vehicle and installed track circuits, which represents one of the major cost drivers in the authorisation process. Indeed each country has developed its own requirements and assessment process – in many cases on an empirical basis and/or not even written down.The EUREMCO objective is to harmonise and reduce the certification process of rail vehicle against Electromagnetic Compatibility (EMC). The main concept of the project is to specify the conditions for cross-accepted certification all around Europe, through sound scientific methodologies allowing for the identification of the “transfer functions” to be applied to results obtained on different test tracks in different countries, for the same power supply system. For this purpose, a common understanding of transients – very short and very high interference currents –and a harmonized test procedure will be also developed. By addressing also non electrified lines, the EUREMCO project will cover the whole European railway network.By closing the corresponding “open points” in the TSIs, the EUREMCO project will lead to a time and cost reduction of the certification process of rail vehicle against Electromagnetic Compatibility issues, which correspond to an estimated saving of €60m for the next 15 years.