Norway building world’s longest, deepest undersea road tunnel

Norway is building what is expected to become the world’s longest and deepest undersea road tunnel, a major infrastructure project aimed at improving transport links along the country’s western coast.

The Rogfast tunnel will stretch 27 kilometres beneath the sea and reach a depth of 392 metres below sea level when completed in 2033, according to CNN.

Construction resumed in 2021 after a temporary suspension. The project is estimated to cost around 25 billion Norwegian kroner ($2.4 billion) and is expected to cut travel time between Bergen and Stavanger by approximately 40 minutes.

The tunnel is part of Norway’s broader plan to establish a ferry-free coastal highway. It will also feature an underground roundabout connecting the island of Kvitsøy, making it a unique engineering feature of the project.

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