Rv47 T-link

AF has built the T-link between E39 in Tysvær and Rv47 on Karmøy, plus the north-south connection between Fosen and E134 in Haugesund - Norway’s longest subsea tunnel.

Project status

Sep 2009

Apr 2013

About the project

The K1 T-link contract is a new road connecting Karmøy, Haugesund and Tysvær Municipality. The project included a subsea tunnel underneath Karmsundet, Førresfjorden and Fosen, tunnel profile T11.5 with roundabout at Fosen (level -60 bsl.), water and frost protection, manholes and pipes, electrical work, highway with roundabouts and road junctions, rails and lighting, pump stations, technical buildings, 2 bridges and 3 road crossings. The T-link consisted of five contracts in total.

NOK 878 million
Contract price
8 950
metre long tunnel
The tunnel stretches between Karmøy, Tysvær and Haugesund and is Norway's longest subsea tunnel, so far.

Karmøy, Norway

Norway’s longest subsea tunnel

A total of 19 k of road is built on the T-link, out of which most of it lies under Karmøysundet and Førresfjorden. Driving down into the tunnel from Karmøy, you can go on for 3 977 metres before reaching a fantastic roundabout 60 metres under the sea, approximately below Fosen, and then choose to continue for 3 764 metres of tunnel towards Tysvær or choose the third tunnel arm towards Haugesund.

The 8 950 metre long tunnel between Karmøy, Tysvær and Haugesund is Norway's longest subsea tunnel, so far. AF is a world leader in injection technology and has specially developed machines that inject cement into bedrock in order to stabilise the rock masses and prevent water from penetrating.