World's longest underwater road will cost $2,400,000,000 and reach 1,286 feet below sea level
Published on Dec 21, 2025 at 5:27 AM (UTC+4)
by Ben Thompson
Last updated on Dec 21, 2025 at 5:27 AM (UTC+4)
Edited by
Amelia Jean Hershman-Jones
The world’s longest underwater road is being built in Norway for a staggering $2.4 billion and will reach 1,286 feet below sea level.
Named Rogfast, this road is set to stretch out at 17 miles long.
For commuters going up and down Norway’s west coast, it’ll rapidly cut out travel times.
Norway is already home to the world’s longest road tunnel, but this is another notch on the company’s belt.
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When can we expect the world’s longest underwater road to be complete?
As you might imagine, a project of this magnitude isn’t done overnight.
But if there’s a country that can get things done, it’s Norway.
It was in the Faroes that we got the world’s first undersea roundabout after all, when the $265 million Eysturoy Tunnel finished construction.
Now we have the Rogfast tunnel on the way, on which work began in 2018, before work paused in 2019 due to financing issues.
The project resumed in 2021 and is expected to be completed by 2033 – 15 years after it started.
The purpose of the mammoth, deepest car tunnel is to join a highway on the west coast of Norway, with the tunnel supposedly being able to cut down journey times by a substantial amount.
This includes travel times between the two cities of Stavanger and Bergen, which is ideal for any commuter.
Rogfast is part of a broader E39 project that won’t be finished until 2050, replacing ferry links with tunnels and bridges.
The hope is that the E39 will boost connectivity, local job access, and economic activity.
It’ll be interesting to see how the project turns out in the end.
It’s an interesting time for cars in Norway
When you think of Norway, many things will spring to mind – the northern lights, icy landscapes, and long winding roads.
It’s an interesting time to be a car owner in Norway, as the country has been repeatedly touted for its high rate of EV use.
The infrastructure is also impressive, as one American found out when he paid a visit.
As EVs are driven more and more throughout the Scandinavian countries, gas stations are becoming something of a rarity.
Out with the gas stations and in with the underwater roads, eh?
Ben joined Supercar Blondie in February 2025 after being published by international organizations including LADbible, The Sun, the New York Post, and the Daily Mail. He covers supercars, rare and collectible vehicles, aviation, luxury assets, and the fascinating people behind them. His reporting has explored everything from seven-figure supercars and historic Ferrari collections to unusual aircraft adventures and extraordinary automotive discoveries from around the world. Ben has also gained first-hand insight into vehicle craftsmanship and customization, including visiting specialist workshops to see bespoke vehicles up close.
