> Now ERTMS is definitely mature enough for metro style frequencies Is it quite? In Germany they're planning to resignal the core of the Stuttgart S-Bahn syste

> Now ERTMS is definitely mature enough for metro style frequencies Is it quite? In Germany they're planning to resignal the core of the Stuttgart S-Bahn system with ETCS, but found that there is still a bit of development work to do in order to actually unlock additional capacity using ETCS, and so the whole project is treated a bit as a sort of pioneering pilot scheme for high capacity applications of ETCS. In the UK ETCS is now in service on the Thameslink core, but AFAIK it has yet to see its design capacity of 24 tph being fully utilised – peeking through realtimetrains.co.uk, it looks like the current maximum peak service is 20 tph.