Due to problems with the platform occupancy in Koblenz Hauptbahnhof, it was not possible until December 2016 for all the trains of the Lahn Valley Railway to continue to Andernach. The "RB 23" services on this section generally run hourly and start in Koblenz Hauptbahnhof at 52 minutes past the hour. The first service begins at 7:52 in Koblenz at the last at 21:52, but on Fridays and Sundays there is an additional service at around 23:52 from Koblenz. From Mondays to Fridays there is also a service at 5:52 and a service from Monday to Saturday at 7:21, both from Koblenz and ending in Andernach. Due to school traffic, the daily service from Koblenz at 12:52 also ends in Andernach. The "RB 23" in this section generally runs hourly and starts in Mayen Ost at 18 minutes past the hour. The first trip begins in Mayen Ost on Mondays to Saturdays at 5:18 and on Sundays at 6:18. The last trip starts daily at 21:18. The last journey from Andernach towards Limburg (Lahn) starts on Sundays to Fridays at 22:50. Unlike the trips in the other direction all services run to Limburg. The "RB 23" in this section generally runs hourly and starts in Koblenz Hauptbahnhof at 9 minutes past the hour. From Mondays to Fridays the first service runs at 5:09, on Saturdays at 6:09 and on Sundays at 7:09. The last service generally runs at 22:09. Afterwards there is still one daily service except on Saturdays running from Andernach 23:10, as well as one on Saturdays and Sundays starting in Koblenz Hauptbahnhof at 0:09. From Mondays to Fridays, the service is changed in the holiday season with journeys starting at 13:39, 16:36, 17:36 and 18:37 from Koblenz Hauptbahnhof. In addition, since December 2015 there are two pairs of trains, which run only to Bad Ems. These trains then return to Koblenz. With these trains, the regular RE 25 and the RB 23 services and additional Koblenz–Limburg services that run in the peak, there are two services per hour between Koblenz and Bad Ems between 12:00 and 18:00. Since the introduction of the "Lahn-Eifel-Bahn", the former "Lahntalexpress" ("RE 25") from Koblenz Hauptbahnhof to Gießen also runs under this name.