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Inside the World's Deepest and Longest Subsea Road Tunnel

MIT Technology Review · Jun 22, 2026 · 1 min read · Read original article →

Curated by the Inblix editorial team


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Norway’s Rogfast is an engineering marvel, 26.7 kilometers long and 390 meters deep, built beneath the North Sea. The tunnel’s construction involves tons of explosives, logistics challenges, and extreme pressure from the water. The project’s success is a testament to Norwegian expertise and determination. It’s a reassuring sight in an era where ambitious projects seem hard to come by. Why it matters: Rogfast’s innovative approach to subsea engineering may inspire other countries to tackle their own ambitious infrastructure projects.

💡 Key Takeaways

  1. Norway's Rogfast is the world's longest and deepest subsea road tunnel, measuring 26.7 kilometers long and 390 meters deep.
  2. The tunnel's construction involves tons of explosives, logistics challenges, and extreme pressure from the water.
  3. Norwegian expertise and determination have made the project a success, despite the numerous challenges involved.

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