The Tromsøysund Tunnel ( no, Tromsøysundtunnelen) is an undersea highway tunnel in Tromsø Municipality in

Troms og Finnmark Troms og Finnmark (; sme, Romsa ja Finnmárku ; fkv, Tromssa ja Finmarkku; fi, Tromssa ja Finnmark, lit. Troms and Finnmark in English), is a county in northern Norway that was established on 1 January 2020 as the result of a regional reform ...

county,

Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...

. The tunnel runs under the Tromsøysundet strait, connecting the island of Tromsøya (and the city of Tromsø) with the mainland suburb of

Tromsdalen Tromsdalen ( sme, Romssavággi Sálašvággi) is an urban neighborhood in the Tromsø (city), city of Tromsø which is in Tromsø Municipality in Troms og Finnmark county, Norway. It is located just to the east of the city centre on the mainland ...

. The tunnel is part of European route E08, (whose northern terminus is on the island itself) and it consists of two tubes, each with two driving lanes. The two tubes are not equal in length; one tube is long and the other is long. The lowest point in the tunnels is below

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardise ...

, and the maximum grade is 8.2%. The two tubes are linked by 15 service-tunnels. The tunnel opened on 3 December 1994 to relieve Tromsøya's only other mainland connection, the Tromsø Bridge, which had been plagued by severe traffic congestion for more than a decade. The tunnel is located to the north of the bridge; on the island side it emerges just below the

University of Tromsø The University of Tromsø – The Arctic University of Norway ( Norwegian: ''Universitetet i Tromsø – Norges arktiske universitet''; Northern Sami: ''Romssa universitehta – Norgga árktalaš universitehta'') is a state university in Norway a ...

and the University Hospital of North Norway, both major sources of traffic between the island and the mainland; on the mainland side it emerges at Tomasjord, which is centrally located between the densely populated suburbs of

and Kroken.

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* {{DEFAULTSORT:Tromsoysund Tunnel Road tunnels in Troms og Finnmark Subsea tunnels in Norway Buildings and structures in Tromsø 1994 establishments in Norway Tunnels completed in 1994 Roads within the Arctic Circle

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