SIGNAL+DRAHT | Issue 07-08/2023
An investigation into the scenarios for upgrading from ETCS L1LS to cab signalling
The Swiss railway network is largely equipped with the European Train Control System Level 1 Limited Supervision (ETCS L1LS). The visual signalling associated with ETCS L1LS is to be replaced with cab signalling (German abbreviation: FSS) as part of the Federal Office of Transport’s (FOT) European Rail Traffic Management System (ERTMS) strategy [1]. Until now, the procedure for migrating to FSS has always been to completely replace the interlockings. In its quest for “upgradability”, Swiss Federal Railways AG (SBB) is seeking solutions for migrating from ETCS L1LS, initially to ETCS L2 and subsequently to L3...