Ryfast

Ryfast is a sub-sea tunnel system in Norway.[1] The tunnel system is part of the Norwegian National Road 13 and it runs between the city of Stavanger, under a large fjord, and to the municipality of Strand in Rogaland county.[2]

The Ryfylke tunnel

When the last section was drilled on 26 October 2017, Ryfast became the longest undersea road tunnel in the world, with its 14.3 km length greater than the Eysturoyartunnilin in the Faroe Islands (11,238 m) Tokyo Bay Tunnel in Japan (9,583 m) and the Shanghai Yangtze River Tunnel (8,950 m) in China.[3] It is also currently the world's deepest subsea tunnel, reaching a maximum depth of 292 meters.[4][5]

The project was approved by the Norwegian Parliament on 12 June 2012 and construction began in the spring of 2013. The cost of Ryfast is estimated to 5.22 billion kr (Norwegian krone).[6] The tunnel system will replace today's ferry route between Stavanger and Tau as well as the ferry from Oanes to Lauvik across the Høgsfjorden.

The tunnel system consists of two subsea tunnels:

  • Hundvåg Tunnel, 5,500 metres (18,000 ft), running from the city of Stavanger to the island of Hundvåg (with a connection to the smaller island of Buøy also. This will also help relieve congestion on the Stavanger City Bridge.
  • Ryfylke Tunnel, 14,400 metres (47,200 ft), running from the island of Hundvåg to just south of the village of Tau in Strand municipality on the other side of the fjord. This will reduce travel time between the Northern Jæren and Ryfylke districts in Rogaland county.

The Ryfast tunnel system joins another tunnel project under construction at the same time. The Eiganes Tunnel will run under the western part of the city of Stavanger.[6]

The first phase of the tunnel system to open was the Ryfylke Tunnel, which officially opened to traffic at noon on December 30, 2019. The Hundvåg tunnel and the related Eiganes Tunnel are scheduled to open in February 2020, which will mark the completion of both construction projects[7].

References
  1. Andersen, Atle (2013-03-01). "Her forberedes Ryfast-byggingen". Stavanger Aftenblad (in Norwegian).
  2. "Ryfast" (in Norwegian). Statens vegvesen.
  3. "Nå er siste fjellrest sprengt vekk i verdens lengste undersjøiske veitunnel". 26 October 2017.
  4. "World's Deepest Subsea Tunnel Opens in Norway". New Civil Engineer. 6 January 2020.
  5. "Fakta om Ryfast-prosjektet" (in Norwegian). Statens vegvesen. 22 April 2020.
  6. "Nå bygger vi Ryfast og Eiganestunnelen" (PDF) (in Norwegian). Statens vegvesen. Cite journal requires |journal= (help)
  7. "Verdens lengste undersjøiske tunnel har åpnet". NRK (in Norwegian). 2019-12-29.


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