S19 (Rhine-Ruhr S-Bahn)
Line S19 is a S-Bahn line of the Rhine-Ruhr network in Germany. It is operated by DB Regio with class 423 electric multiple units.
The S19 runs until the early evening from Düren via Cologne to Blankenberg, Herchen or Au on working days and between Düren and Hennef on Saturdays, Sundays and public holidays. Services to/from Herchen or Au do not stop in Blankenberg. It shares most of this route with line S12, but it runs through Cologne/Bonn Airport instead of through Porz. The S12 also no longer runs west of. The S19 also shares most of its route with the S13 service, which, however, does not run east of Troisdorf. Many S13 services also do not run west of Sindorf. Services operate every 60 minutes.
It will run 24/7 from December 2019 between Duren and Hennef for 17 stations and not only between Cologne Hbf and Cologne/Bonn Airport.History
The route runs on the Cologne–Aachen line, the East Rhine Railway, the Cologne Airport loop and the Sieg Railway.
6 additional pairs of services in the morning peak and 11 additional pairs of services in the afternoon peak ran on the Horrem – Köln Hansaring – Cologne – Cologne/Bonn Airport – Troisdorf– Siegburg/Bonn – Hennef route as line S19 from 14 December 2014. Since December 2015, the S19 services have run at 60-minute intervals from Düren to Au, replacing an S13 service.
