VICE4RAIL aims to accelerate the adoption of EGNSS for deploying efficient, resilient, and competitive ERTMS solutions. Focus is on the development of a certification and standardization process for the use of EGNSS, closing the gaps for rail safety critical applications and converging towards a pan-European EGNSS-based solution for ERTMS and its global roll-out. The starting point is the use of EGNOS V2 and the Balise virtualisation – as indicated by the European Parliament directive on July 2021 – opening the way for further applications based on the absolute train positioning and EGNOS V3. Two major developments will be undertaken: identification of suitable certification procedures compliant with the CENELEC norms and realization of a Hybrid Virtualized Testing Certification Environment based on the zero-on-site testing paradigm with the construction of a dedicated testing facility on a RFI’s railway lines where GNSS-based multisensor positioning solutions can be evaluated and certified in operational scenarios. This unique testing environment will be connected with the ERTMS accredited laboratory of CEDEX to assess the end-to-end performance of the ERTMS chain with GNSS-based positioning devices in operational scenarios. Behaviour of the system under GNSS signals that include faults very rare and difficult to experience field but with a potential high impact on safety, can be evaluated avoiding extensive and not exhaustive field tests. VICE4RAIL will exploit the synergies with the Pilot Line Novara – Rho funded by RFI to integrate GNSS positioning into the ERTMS and the Shift2Rail GATE4Rail project that introduced the zero-on-field virtual testing for GNSS. Furthermore, thanks to SNCF, CEDEX, RFI and SOGEI a liaison will be established with the Europe’s Rail R2DATO project to complement their on-going activities and sharing results and assets and with the RTCM SC 134 Special Committee that is completing the standardization process for GNSS receivers for rail.