DB InfraGO builds new Cologne-Mülheim interlocking for EUR 85m

DB InfraGO is equipping the S-Bahn line Cologne-Mülheim–Bergisch Gladbach with digital interlocking technology and extra switches, investing EUR 85 million in total; the technology is a prerequisite for double-tracking and later for ETCS. S 11 services are replaced by buses from 10 April to 3 July 2026, followed by night work until 4 September 2026 and further closures in 2027, including 9 July to 15 October 2027. The date is a placeholder: it marks the end of the last closure mentioned, as no commissioning date is given (LOK Report, 19 Mar 2026).