- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 30 Nov 2020
Norway could build world-first floating tunnel
The west side of Norway is made up of 1,190 fjords, which, while beautiful, make it very hard to travel along the country’s coastline.
Currently, the drive from the southern city of Kristiansand to Trondheim in the north takes 21 hours and requires seven ferry crossings.
To make that drive easier, the Norwegian Public Roads Administration (NPRA) has proposed the world’s first underwater floating tunnel, which would be submerged in the Norwegian Sea. It is predicted to cost $25bn (around £19m) to build.
The tunnel is part of a series of proposed solutions for the Route E39 coastal highway devised by the NPRA.
 What would it look like?
Image: Google Maps
There would be wide gaps between the pontoons to allow ferries to pass through.
The NPRA is also considering creating a 3,700m-long suspension bridge, which would be three times the length of San Francisco’s Golden Gate bridge and double the current world record for a bridge’s length.
The first proposed crossing is for Sognefjord which links up Oppedal with Lavik. By 2035, the crossings are set to be installed between many of the country’s fjords, according to Wired.
 About this article
This article was written by Will Heilpern, Features Writer, Business Insider, and is published in collaboration with Business Insider. The views expressed in this article are those of the author alone and not of the World Economic Forum. It was also published on the Future of Construction Knowledge Sharing Platform and the WEF Agenda Blog.
 Related articles on Designing Buildings Wiki
- At grade.
- Excavating plant.
- Ground conditions.
- Grouting in civil engineering.
- Railway engineering.
- Road construction.
- Sewer construction.
- Shotcrete technology.
- Temporary works.
- Trench support.
- Trenchless technology.
- Tunnels of the world.
- Underpass construction.
Featured articles and news
IHBC responds to PDR and defence infrastructure development.
Final report proposes improvements for UK-wide transport infrastructure.
The decarbonisation transition has begun.
Can smart homes take care of their occupants?
A showcase of She ethnic culture.
CIOB creates charter and publishes special report.
Response submitted by IHBC.
Designed to accommodate flooding or waterway traffic.
ECA states concerns over the Government's disparate plans.