Harmersbach Valley Railway
| Biberach–Oberharmersbach | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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 Harmersbach Valley Railway | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Service | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Route number | 722 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Technical | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line length | 10.6 km | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Track gauge | 1,435 mm | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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The Harmersbach Valley Railway (German: Harmersbachtalbahn) is a 10.6 km long branch line in southwestern Germany that branches off in Biberach from the Black Forest Railway and ends in Oberharmersbach-Riersbach.
The Harmersbach Valley Railway was opened on 15 December 1904 by the Vering & Waechter construction and operating company in Berlin, from whom it was transferred on 1 April 1917 to the German Railway Operating Company. Since 1963 it has belonged to the state-owned Südwestdeutsche Verkehrs-Aktiengesellschaft (SWEG). Its subsidiary, the Ortenau S-Bahn (OSB), runs the line today.
Since December 2005 single journeys via Biberach from and to Offenburg were connected. The rail traffic is enhanced by a parallel-running bus line owned by the SWEG, that is operated by a local sub-contractor.