# Norway maritime and transport tunnel developments

> Live situation record from CLSTR: https://clstr.news/situations/norway-maritime-and-transport-tunnel-developments
> Updated: 2026-10-08T12:56:42.000Z. Sources: 12. Developments: 4.

Norway is advancing several major maritime and terrestrial infrastructure projects. The Norwegian Coastal Administration (Kystverket) finalized a contract with AF Gruppen to build the Stad Ship Tunnel, the world’s first full-scale ship tunnel. Despite facing potential cancellation due to financial constraints and inflation, the project was secured through political negotiations involving the Centre Party. Simultaneously, other large-scale tunnel developments are progressing in the country. In the Rogaland region, construction is underway for the Rogfast project, a €2 billion underwater road tunnel beneath the Boknafjord. Spanning 26.7 kilometers and reaching depths of approximately 390 meters below sea level, the tunnel is designed to provide a continuous route along the E39 highway, significantly reducing travel times between Stavanger and Bergen while allowing for the removal of existing ferry services. At its deepest points, the structure will be separated from the seabed by a rock layer only about 50 meters thick. The project, which began in 2018, is expected to be completed by 2033. Recent updates regarding the Rogfast Tunnel highlight its design as a two-tube structure, with each tube containing two lanes. The project will feature a unique double roundabout located approximately 260 meters below sea level, which will also include a connection tunnel to the island of Kvitsøy. The estimated cost is approximately 25 billion Norwegian kroner (roughly 2.4 billion US dollars). Once operational, the tunnel is projected to reduce travel time between Bergen and Stavanger by about 40 minutes. As the project continues, it is noted as being on track to become the world’s longest and deepest underwater road tunnel, though it has faced challenges including cost increases and safety incidents. Construction involves significant engineering challenges, such as managing extreme water pressure and blasting through rock rather than using traditional tunnel boring machines.

## Timeline

### 2026-10-08: Norway building world's longest underwater road tunnel

Norway is building the Rogfast tunnel, a 26.7 km record-breaking underwater road project under the Boknafjord, expected to reduce travel time between Stavanger and Bergen by 40 minutes by 2033.

4 sources. https://clstr.news/cluster/rogfast-tunnel-norway-building-worlds-deepest-underwater-tunnel

### 2026-10-03: Norway constructing world's longest underwater road tunnel

Norway is building the Rogfast tunnel, a 26.7 km underwater road project under the North Sea, expected to be the world's longest and deepest by its 2033 completion.

2 sources. https://clstr.news/cluster/norway-constructing-worlds-longest-underwater-road-tunnel

### 2026-09-21: Norway develops record-breaking underwater and pedestrian tunnels

Norway is developing record-breaking infrastructure, including the massive 27km Rogfast underwater road tunnel and the Fyllingsdalstunnelen, a long dedicated tunnel for cyclists and pedestrians in Bergen.

2 sources. https://clstr.news/cluster/norway-develops-record-breaking-underwater-and-pedestrian-tunnels

### 2026-08-25: Norway signs contract for world's first ship tunnel

Norway has signed a contract with AF Gruppen to build the world's first full-scale ship tunnel at Stad, a project saved from cancellation through budget modifications and political compromise.

5 sources. https://clstr.news/cluster/norway-signs-contract-for-worlds-first-ship-tunnel

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Cite as: Norway maritime and transport tunnel developments. CLSTR, https://clstr.news/situations/norway-maritime-and-transport-tunnel-developments