The Gotthard railway (; ) is the Swiss trans-alpine railway line from northern Switzerland to the canton of Ticino. The line forms a major part of an important international railway link between northern and southern Europe, especially on the Rotterdam-Basel-Genoa corridor. The Gotthard Railway Company () was the former private railway company that financed the construction of and originally operated that line.
The railway comprises an international main line through Switzerland from Basel (French Bâle) or Zürich to Immensee to Chiasso, together with branches, from Immensee to Lucerne and Rotkreuz, from Arth-Goldau to Zug, and from Bellinzona to Chiasso, via Locarno and Luino. The main line, second highest standard railway in Switzerland, penetrates the Alps using the Gotthard Tunnel at above sea level. The line then descends as far as Bellinzona, at above sea level, before climbing again to the pass of Monte Ceneri, on the way to Lugano and Chiasso. The extreme differences in altitude necessitate the use of long ramped approaches on each side, together with seven spirals.
Construction of the line started in 1872, with some lowland sections opening by 1875. The full line opened in 1882, following the completion of the Gotthard Tunnel. The line was incorporated into the Swiss Federal Railways in 1909 and electrified in 1922. The line has 36 tunnels totaling 31,216 meters.
The approaches to the existing tunnel continue to restrict speed and capacity on this important international route, and in 1992 it was decided to build a new lower level route on the Gotthard axis as part of the NRLA project. This route involves the construction of the new Gotthard Base Tunnel and Ceneri Base Tunnel. The Gotthard Base Tunnel has been completed and was integrated with the existing route in 2016, while the Ceneri Base Tunnel was opened in 2020.
History
Conception
By the early 1870s, northern Switzerland had a significant network of railways, with links to the adjoining railways of Germany and France. To the west, a line had reached , in the upper Rhone valley, from Lausanne. In the central north, lines linked Olten, Lucerne, Zug and Zürich. However, no line had yet reached through the Alps to southern Switzerland or the border with Italy. All north-to-south rail traffic had to pass either to the west or east of Switzerland through the Mont-Cenis, Semmering or Brenner railways.
A north-south route through Switzerland had been discussed as far back as 1848. An international conference in Bern in 1869 had decided that the best route would be via the valleys of the rivers Reuss and Ticino, linked by a tunnel under the Gotthard Pass. The selected route was an ancient one that pilgrims and traders had used since at least the 13th century.
Treaties for the construction of the line were made with the Kingdom of Italy, in 1869, and the German Empire, in 1871. The Gotthard Railway Company was incorporated in Lucerne in 1871. To the overall costs of CHF 238 million (in 1869/71) the Italian government eventually contributed CHF 58 million (£2.25 million), with Germany contributing CHF 30 million (£1.25 million).
Construction and opening
Construction of the Gotthard railway started in 1872, and the first lowland sections from Biasca to Locarno and Lugano to Chiasso were opened by 1874.
The whole line was inaugurated with festivities in Lucerne and Chiasso from 21 May to 25 May 1882. Scheduled operations started on 1 June. At the time, the Gotthard Rail Tunnel was the world's longest rail tunnel (seconded by the Simplon Tunnel in 1906). Soon after construction, the army secured the line with fortresses (for instance, above Airolo, and at Biasca) and ways to block the tunnel in case of an invasion (among others, an artificial landslide to block the southern tunnel entrance).
At the same time, the Aargauische Südbahn completed the section from Rotkreuz to Immensee, which provided a rail link from Aarau. The additional feeder lines from Lucerne to Immensee, and from Zug to Arth-Goldau were completed in 1887.