This article is about underground passages. For other uses, see Tunnel (disambiguation).
Tunnel in Col du Galibier, FranceTunnel in Fort de Mutzig, FranceDecorated portal to a road tunnel in Guanajuato, MexicoUtility tunnel for heating pipes between Rigshospitalet and Amagerværket in Copenhagen, DenmarkTunnel on the Taipei Metro in TaiwanSouthern portal of the 421 m long (1,381 ft) Chirk canal tunnel, Wales
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is enclosed except for the portals, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment.
Secret tunnels are built for military purposes, or by civilians for smuggling of weapons, contraband, or people. Special tunnels, such as wildlife crossings, are built to allow wildlife to cross human-made barriers safely. Tunnels can be connected together in tunnel networks.
not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be...
Channel Tunnel (French: Tunnel sous la Manche), sometimes referred to informally as the Chunnel, is a 50.46-kilometre (31.35 mi) undersea railway tunnel, opened...
In physics, quantum tunnelling, barrier penetration, or simply tunnelling is a quantum mechanical phenomenon in which an object such as an electron or...
This list of longest tunnels ranks tunnels that are at least 13 km (8.1 mi) long. Only continuous tunnels are included. Pipelines, even those that are...
The Holland Tunnel is a vehicular tunnel under the Hudson River that connects Hudson Square and Lower Manhattan in New York City in the east to Jersey...
The tunnel rats were American, Australian, New Zealander, and South Vietnamese soldiers who performed underground search and destroy missions during the...
Look up tunneling in Wiktionary, the free dictionary. Tunneling or tunnelling may refer to: Digging tunnels (the literal meaning) Hobby tunneling Quantum...
East West Metro Tunnel is a underwater river tunnel of Kolkata Metro in Kolkata, West Bengal. The river tunnel is constructed underneath Hooghly River...
networking, the Tunnel Setup Protocol (TSP) is an experimental networking control protocol used to negotiate IP tunnel setup parameters between a tunnel client...
Mujibur Rahman Tunnel (Bengali: বঙ্গবন্ধু শেখ মুজিবুর রহমান টানেল), also known as Karnaphuli Tunnel, is an underwater expressway tunnel in the port city...
Atal Tunnel (also known as Rohtang Tunnel), named after former Prime Minister of India, Atal Bihari Vajpayee is a highway tunnel built under the Rohtang...
In the human body, the carpal tunnel or carpal canal is a flattened body cavity on the flexor (palmar/volar) side of the wrist, bounded by the carpal bones...
Carpal tunnel syndrome (CTS) is the collection of symptoms and signs associated with nerve compression of the median nerve at the carpal tunnel. Most CTS...
In computer networks, a tunneling protocol is a communication protocol which allows for the movement of data from one network to another. It can, for...
Look up tunnel of love in Wiktionary, the free dictionary. Tunnel of love may refer to: Tunnel of Love (railway), a section of industrial railway located...
An underwater tunnel is a tunnel which is partly or wholly constructed under the sea or a river. They are often used where building a bridge or operating...
Look up tunneler or tunneller in Wiktionary, the free dictionary. Tunneller or Tunneler may refer to: A worker in a tunnel A surgical device Tunnel boring...
An IP tunnel is an Internet Protocol (IP) network communications channel between two networks. It is used to transport another network protocol by encapsulation...
A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil...
Sela Tunnel is a road tunnel at 3,000 metres (9,800 ft) which ensures all-weather connectivity between Guwahati in Assam and Tawang in Arunachal Pradesh...
construction workers, on behalf of the synagogue's leaders, attempted to fill in a tunnel that students had illegally dug beneath the building. The New York City...
Harbour Tunnel or Harbor Tunnel may refer to: Sydney Harbour Tunnel, New South Wales Western Harbour Tunnel, New South Wales Cross-Harbour Tunnel, Hong...
A shark tunnel (or aquarium tunnel, acrylic tunnel and exhibit tunnel) is an underwater tunnel that passes through an aquarium, typically with sharks and...
Tunnel Records is a record label founded by DJ Dean, and based in Hamburg, Germany. Tunnel Records was home to artists and groups such as X-Dream, DJ Dean...
Wind tunnels are machines where an object is held stationary inside a tube, and air is blown around it to study the interaction between the object and...
The Lincoln Tunnel is an approximately 1.5-mile-long (2.4 km) tunnel under the Hudson River, connecting Weehawken, New Jersey, to the west with Midtown...
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