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World's Longest Undersea Tunnel Set to Transform Travel by 2033

12/19/2025

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Story summary
  • Rogfast will be the world's longest and deepest undersea road tunnel, set to be completed in 2033.
  • The 27-kilometer tunnel replaces the E39 ferry crossing, cutting Stavanger–Bergen travel by 40 minutes.
  • Engineers drill through solid rock and install built-in safety and monitoring systems.
  • The project costs about 25 billion kroner, with the government funding 40 percent and tolls covering the rest.
  • Rogfast supports eliminating E39 ferries by 2050, improving connectivity.