The local service, which was branded as the Rothaar-Express when it was launched, has been running hourly between Bad Berleburg and Siegen since then.

At the turn of the millennium, Alstom Coradia LINT 27 multiple units (class 640) were used on the line, which were retained even after the contract had been awarded to Dreiländerbahn.

[2] With the winning of the contract for the Eifel-Westerwald-Sieg diesel network, the Hessische Landesbahn took over the operation of the RB 93 line from DB Regio at the timetable change in December 2014.

Connections towards Dillenburg, Gießen and Frankfurt in Siegen require waiting times of about 40 to 55 minutes.

In Erndtebrück, there is a connection to the Obere Lahntalbahn (RB 94) to Marburg via Bad Laasphe and Biedenkopf.