During the Second World War, a bridge at the entrance to Friedberg station that carried the second track to the Main-Weser Railway was destroyed.

This also made the block post at Straßheim at the original ladder junction at the entrance to the station superfluous.

Based on the width of the embankment and the bridges, the location of the former second track is still largely recognisable and a piece of it was maintained as a catch point at the junction to the industrial siding in Rosbach.

The bridge over the line to Hanau still exists and it now carries a freight connection from the Main-Weser Railway to the goods yard above the station.

Also the sections of track became more operationally distinct at the end of the 20th century: the tight timing and the introduction of S-Bahn electric multiple units to Friedrichsdorf contrasted with the operations over the Friedrichsdorf–Friedberg line, which were mainly consisted of push-pull trains composed of Silberling (n-coaches) hauled by V 100 locomotives and Uerdingen railbuses; these were replaced by class 628 diesel multiple units, but services ran ever less frequently.

The class 628 sets when not operating were usually stored outside Friedrichsdorf station towards Seulberg on a track to a no longer connected marshalling yard hump.

With the commencement of S-Bahn operations to Friedrichsdorf and also to Friedberg, the normal Friedberg–Bad Homburg–Frankfurt through services were finally discontinued, although some long-distance trains still used the line.

After previous considerations of closing the line, the Butzbach-Licher Eisenbahn (BLE), a subsidiary of the Hessische Landesbahn, took over operations on 24 May 1998.

A footbridge in Friedrichsdorf parallel to Färberstraße was increased in the meantime as part of its renewal to allow for a possible overhead line.

The replacement of the bridge over the former Federal Highway 3 at the halt of Friedberg Süd was carried out in July 2017 during a three-week full closure of the line.

Before that, until the station was resignalled with an electronic interlocking, an industrial siding ran to the left (the town side/west) to Raiffeisen and the Ray Barracks.

The vehicles have an entry height of 55 centimetres, which is appropriate for the platforms at the various stations between the termini and are partially equipped with toilets.

As part of the possible electrification of the Taunus Railway, the RB 16 service is to be extended to provide capacity at Bad Homburg.