Siemens is equipping 230 traction units belonging to the Schweizerische Bundesbahn (SBB – Swiss Federal railways) with Trainguard-200 On-Board-Units. These mobile on-board computers are compatible both with the European Train Control System (ETCS) Level 1 and 2 and the national train protection system ZUB 121. “The on-board unit calculates and monitors the maximum permissible speed […]