Norway's Rogfast: World's Deepest, Longest Undersea Road Tunnel Under Construction

• Norway is constructing Rogfast, set to be the world's longest (27 km) and deepest (392 meters below sea level) undersea road tunnel.
• The project aims to reduce travel time between Stavanger and Haugesund, replacing ferry routes and improving connectivity along Norway's west coast.
• Construction began in 2018, paused in 2019 due to cost overruns, and resumed in 2021; completion is now expected in 2033 at an estimated cost of $2.4 billion.
• Rogfast will feature two separate tunnel tubes, each with two lanes, and a unique double roundabout 260 meters deep connecting to Kvitsøy island.
• Advanced laser scanning technology ensures precision (5 cm margin of error) during excavation, creating a 'digital twin' for accuracy and efficiency.

Why It Matters: Norway's Rogfast tunnel will revolutionize coastal travel, setting new global standards for undersea road infrastructure.