The northern section is also served hourly by the Rhein-Erft-Express (RE 8) and the "Rhein-Erft-Bahn" (RB 27) lines. The RE-8 serves the Cologne/Bonn Airport station and extends south of Koblenz on the Horchheimer Bridge. It uses Series-425 electric locomotives and a maximum speed of 140 km/h. The RB 27 operates between Porz and Koblenz, crossing from the north via the Urmitz Bridge. It operates non-stop from Koblenz to Cochem twice daily. The RB-27 uses Series-143 electric locomotives and three double-decker carriages with a maximum speed of 120 km/h. From Moenchengladbach to Rommerskirchen, the tariffs of the Verkehrsverbund Rhein-Ruhr (VRR) apply; from Grevenbroich to Neuwied, those of the Verkehrsverbund Rhein-Sieg (VRS); and from Unkel to Koblenz, the tariffs of the Verkehrsverbund Rhein-Mosel (VRM).