St. Gallen–Trogen railway

The St. Gallen–Trogen railway line, or Trogenerbahn , is a 9.8 kilometres long railway line in Switzerland. It links the city of St. Gallen,in the canton of St. Gallen, with Speicher and Trogen, both in the canton of Appenzell Ausserrhoden. Passenger service on the line now forms part of the St. Gallen S-Bahn, branded as the S21.
The line was opened in 1903, and was built as a rural electric tramway. Whilst much of the line has been upgraded, this is still apparent in the long stretches of roadside track, and in its exit from St. Gallen over street track. With a gradient of 7.6%, it is the steepest narrow-gauge adhesion railway in Switzerland.

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