ERTMS deployment is progressing across Europe, but compared to the EDP (European Deployment Plan 2017) major delays are also noticeable. The ambitions laid down in TEN-T Regulation can only be achieved with an important acceleration of ERTMS deployment. In this workshop we will try to identify all possible blocking factors that prevent a fast/accelerated ERTMS roll-out. We will also look at what could be done to accelerate the roll-out for both trackside and on-board.