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The Lopper I Rail Tunnel is a railway tunnel in central
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
. The tunnel connects Hergiswil in the canton of Nidwalden with Alpnach in the canton of Obwalden. It forms part of the Zentralbahn Brünig line, which links
Lucerne Lucerne ( , ; High Alemannic German, High Alemannic: ''Lozärn'') or Luzern ()Other languages: gsw, Lozärn, label=Lucerne German; it, Lucerna ; rm, Lucerna . is a city in central Switzerland, in the Languages of Switzerland, German-speaking po ...
with Interlaken and the Bernese Oberland, between Hergiswil station and Alpnachstad station. It is in length, and carries
metre gauge Metre-gauge railways are narrow-gauge railways with track gauge of or 1 metre. The metre gauge is used in around of tracks around the world. It was used by European colonial powers, such as the French, British and German Empires. In Europe, la ...
() track electrified at 11 k V AC 16 2/3 Hz using overhead catenary. The tunnel runs under the Lopper, a shoulder of
Mount Pilatus Pilatus, also often referred to as Mount Pilatus, is a mountain massif overlooking Lucerne in Central Switzerland. It is composed of several peaks, of which the highest () is named ''Tomlishorn''. Geography and transport The whole mountain ...
which extends into Lake Lucerne. The Lopper I Tunnel is paralleled by the
Lopper road tunnel The Lopper Road Tunnel is a tunnel in central Switzerland. The tunnel connects Hergiswil in the canton of Nidwalden with Alpnach in the canton of Obwalden, and forms part of the A8 motorway. The tunnel was opened in 1984, and is long. The tunnel ...
, carrying the A8 motorway. The nearby Lopper II Tunnel is a rail tunnel on the Zentralbahn Luzern–Stans–Engelberg line, the two rail lines joining at Hergiswil station.


References

Transport in Nidwalden Transport in Obwalden Railway tunnels in Switzerland {{Switzerland-struct-stub