Lists of spiral (helicoidal) tunnels and tunnels on a curved alignment on roads and railway lines worldwide.
Road tunnels
* Churchischleif, road to
Isenfluh
Isenfluh is a hamlet in Switzerland, north of the road from Wilderswil to Lauterbrunnen. It is first mentioned in 1319 as ''Ysenfluo'' and in 1401 people from the Lötschental started to settle in the small hamlet. The hamlet belonged to the mo ...
Formazza
Formazza ( wae, Pumât, pms, Formassa) is a ''comune'' (municipality) in the Province of Verbano-Cusio-Ossola in the Italian region Piedmont, located about northeast of Turin and about north of Verbania, on the border with Switzerland.
Formazz ...
,
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...
Jinjiazhuang Tunnel
Jinjiazhuang Tunnel () or Jinjiazhuang Spiral Tunnel (), is the world's longest highway spiral tunnel. The spiral has a curve radius of and the elevation difference between the tunnel entrance and exit is .
The tunnel is on S3801 Beijing-Chongl ...
(金家庄隧道), world's longest spiral highway tunnel, located in
Chicheng
Chicheng (), or Ch’ih-ch’eng, is a county under the administration of Zhangjiakou City, northwestern Hebei province, bordering Beijing to the southeast. The total area of the county is . The easternmost county-level division of Zhangjiakou, i ...
,
Zhangjiakou
Zhangjiakou (; ; ) also known as Kalgan and by several other names, is a prefecture-level city in northwestern Hebei province in Northern China, bordering Beijing to the southeast, Inner Mongolia to the north and west, and Shanxi to the southw ...
, China
* Tagountsa Tunnel, High Atlas, Morocco. A short spiral tunnel built along a now disused military road in 1933.https://www.google.com/maps/place/32°10.125'N+4°56.57'W
* Wolonggou Tunnel (卧龙沟长隧道) a motorway tunnel between
Xunhua
Xunhua Salar Autonomous County ( zh, s=循化撒拉族自治县, p=Xúnhuà Sǎlázú Zìzhìxiàn; slr, Gökhdengiz Velayat Yisyr Salyr Özbashdak Yurt) is a Salar autonomous county in the southeast of Haidong Prefecture of Qinghai Province, C ...
A part of a line is bracketed (), if it is located in a country other than that mentioned in the specific table:
Example: :(Lausanne – Montreux – Sierre – Visp – Brig – ) → Switzerland
Africa
South Africa
Americas
Canada
Asia
Russia
Europe
Croatia
France
Germany
Italy
Norway
Russia
Switzerland
The turn tunnels in the following table are sorted from West to East according to the location of the start point of the line.
Slovakia
United Kingdom
Oceania
New Zealand
Australia
References
* Hans G. Wägli: Schienennetz Schweiz/Réseau ferré suisse; Schweizerische Bundesbahnen, Generalsekretariat; 1980; (Edition 1998)
Locations partly from:
Bundesamt für Landestopografie Landeskarte der Schweiz, Zusammensetzung 101, Thuner See Zentralschweiz, 1:100'000, 1987
Office fédéral de topographie Carte nationale de la Suisse, Assemblage 104, Lausanne-Bern, 1:100'000, 1986
* Office fédéral de topographie, Carte nationale de la Suisse, Assemblage 105, Valais∙Wallis, 1:100'000, 1987
* Bundesamt für Landestopografie, Landeskarte der Schweiz, Zusammensetzung 106, Glarnerland Bündnerland, 1:100'000, 1985
Ufficio federale di topografia Carta nazionale della Svizzera, Carte riunite 107, Ticino∙Tessin, 1:100'000, 1987
{{DEFAULTSORT:Spiral Tunnels And Tunnels On A Curved Alignment
Spiral
In mathematics, a spiral is a curve which emanates from a point, moving farther away as it revolves around the point.
Helices
Two major definitions of "spiral" in the American Heritage Dictionary are: