European railroads need a rapid transformation towards a more attractive, user-friendly, cost-optimized, easy-to-maintain, efficient and sustainable European railroad system, integrated into a more comprehensive (digital) mobility system, in order to become more competitive. Virtual validation is the focus of the COMET research project “Bayesian Framework for Virtual Validation” with TU Graz and Knorr-Bremse: An intelligent combination of the virtual models with the real systems enables a continuous development, integration and validation process and delivers maturity and confidence in the new solutions.