RhB

The RhB(Rhaetian Railway, - Rhätische Bahn (German) / Ferrovia Retica (Italian) / Viafier Retica (Rumantsch)) has the largest network of all the private railways in Switzerland. The company operates most of the railways in the south-easternmost canton of Graubunden (German), Grignoni (Italian), Grischun (Rumantsch), or Grisons (French/English) - the Federal Railways SBB-CFF-FFS only extend a few kilometres over the cantonal border to the capital at Chur.

The RhB serves the major tourist centre of St Moritz[?], while one of the lines, the Berninabahn, after traversing the Bernina Pass crosses the Italian border to Tirano, where there is a link to the Italian railways.

The RhB network was developed in various stages at the end of the 19th and early 20th centuries, with the result that several different electrification systems are in use, and one 12km section between Castione and Cama is completely separate from all other railways following a landslide in the mid-20th century. All the RhB is of 1000mm gauge, and is electrified:

• 61km, the Bernina Bahn (Pontresina - Tirano) is electrified at 1000V.
• 12km, (Castione-Cama) is electrified at 1500V.
• 321km is electrified at 11kV 16.7Hz (including Chur-Arosa and the new Vereina tunnel route opened in the 1990s)