Yes and no. The limit until 2010 was 670m in nearly all parts of western europe. Block signals, crossroads, stations… need to be made sufficient long enough. W

Yes and no. The limit until 2010 was 670m in nearly all parts of western europe. Block signals, crossroads, stations… need to be made sufficient long enough. With ETCS [1] there are no "fixed" physical block segements anymore. They are simulated in software and allow a much higher densitiy of trains and also longer trains. While SBB is highly motivated to roll out and migrate their legacy signalling systems, it's still a long way. The new Gotthard Base Tunnel is already built ETCS-only. https://en.wikipedia.org/wiki/European_Train_Control_System https://en.wikipedia.org/wiki/European_Train_Control_System