Hexagon tech supports Skanska on Norway subsea road tunnel

A worker uses Hexagon tech for Project Rogfast in Norway. Work is underway on what is to be the the longest and deepest subsea road runnel in the world. Image courtesy Hexagon

The tunnel, which will run 392m below sea level, will connect Stavanger, Haugesund, and Bergen, cutting travel times by about 50% and improving links to the country’s oil and gas sector. Tunnelling is taking place from both ends with an alignment tolerance of 5cm.

Skanska is using Hexagon’s Leica Geosystems portfolio, including total stations, GPS, multistations, and laser scanners to guide excavation and drilling. The company said the technology is reducing rework, costs, and emissions by enabling real-time data capture and validation, while supporting safe operations in challenging conditions.

Hexagon said Skanska is also deploying equipment such as the Leica RTC360, Leica MS60 MultiStation, Leica AP20 AutoPole and Leica TS60.

“In a project like this, even a millimetre of misalignment can trigger cascading risks,” said Trond Valleur, vice president at Skanska. “Hexagon’s technology gives our teams the confidence to move forward with accuracy, efficiency and safety.”

Project Rogfast is currently estimated to cost around NOK 25 billion (approximately US$2.4 billion). Despite initial delays and budget revisions, the scheme is said to be on track for opening in 2033. The design includes a first of its kind ‘subsea roundabout junction’ near Kvitsøy, built roughly 260m below sea level to enable continuous traffic flow even during maintenance or emergencies.

Image courtesy Hexagon

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