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Vestfjarðagöng (, regionally also , "Westfjords Tunnel") is the longest tunnel in 
The tunnel has three entrances and the three arms meet at junction in the tunnel. The three arms are known as:
*Breiðadalur, 4,150 m (13,615 ft), which gives access to
Iceland
Iceland ( is, Ísland; ) is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which (along with its s ...
, located in Westfjords
The Westfjords or West Fjords ( is, Vestfirðir , ISO 3166-2:IS: IS-4) is a large peninsula in northwestern Iceland and an administrative district, the least populous administrative district. It lies on the Denmark Strait, facing the east coast ...
in northwestern Iceland. It has a length of and was opened in September 1996.
The tunnel has three entrances and the three arms meet at junction in the tunnel. The three arms are known as:
*Breiðadalur, 4,150 m (13,615 ft), which gives access to Flateyri
Flateyri ( Icelandic: ) is a village situated in Iceland's Westfjords. It is part of the municipality of Ísafjarðarbær and has a population of approximately 200, making it the largest settlement in Önundarfjörður.
History
Flateyri has been ...
and the south-western part of the Westfjords;
*Botnsdalur 2,907 m (9,537 ft), which gives access to the village of Suðureyri
Suðureyri () is a small Icelandic fishing village perched on the tip of the 13 km-long Súgandafjörður in the Westfjords.
The community was isolated for years by the huge mountains and rough road that led over them. Now it is connected to ...
to the west, a dead end route;
*Tungudalur 2,103 m (6,900 ft), which gives access to Ísafjörður
Ísafjörður (pronounced , meaning ''ice fjord'', literally ''fjord of ices'') is a town in the northwest of Iceland.
The oldest part of Ísafjörður with the town centre is located on a spit of sand, or ''eyri'', in Skutulsfjörður, a fjord ...
and the northern part of the Westfjords.
Only the Tungudalur arm has two lanes throughout. Much of the rest of the tunnel has only one lane with passing places, with traffic light control to avoid collisions.
The tunnel avoids the Breiðadalsheiði road pass, whose summit at 610m was formerly the highest pass in regular use in the Westfjords. It was frequently blocked by snow and prone to avalanches.
References
Road tunnels in Iceland Tunnels completed in 1996 Buildings and structures in Westfjords {{Europe-tunnel-stub