The Bernese Oberland Railway opens up the Lütschinen valleys and, with its blue-yellow trains, connects Interlaken Ost with Grindelwald and Lauterbrunnen. As a rule, two trains are coupled together until Zweilütschinen, where they are separated. One train travels onwards to Lauterbrunnen, the other to Grindelwald. All compositions can be coupled together for shuttle purposes, with the locomotive always positioned on the uphill end of the train. A control car with driver's cab is positioned on the downhill end to avoid any switching manoeuvres at turning stations.