Plochingen–Immendingen railway

The Plochingen–Immendingen railway is a main-line railway line in the German state of Baden-Württemberg. It runs from Plochingen via Horb am Neckar to Immendingen, following the upper reaches of the Neckar from Plochingen to Neckartailfingen and from Kirchentellinsfurt to Rottweil, and finally the Danube from Tuttlingen to the end of the line. It was therefore also historically known as the Obere Neckarbahn or the Obere Neckartalbahn. The Rottweil-Immendingen section used to be called the Obere Donaubahn or Obere Donautalbahn.

The Plochingen–Tübingen section is now sometimes known as the Neckar-Alb-Bahn, the Tübingen–Horb section as the Kulturbahn, the Horb–Tuttlingen section as part of the Gäubahn and the Tuttlingen–Immendingen section as the Donaubahn.