An unprecedented engineering feat is about to unite Denmark and Germany with the construction of the Fehmarnbelt tunnel.

Expected to be the world’s longest underwater tunnel, it will stretch for 18 kilometers, connecting Rødbyhavn in Denmark to Fehmarn in Germany.

The tunnel is scheduled for completion in 2029 and promises to transform the transport dynamics between the two countries, reducing travel times from 45 minutes by ferry to just seven minutes by train and ten minutes by car.

The volume of resources employed in the project is monumental, with 360 thousand tons of steel being used in the construction, an amount comparable to that needed to erect 50 Eiffel Towers.

The tunnel will consist of 79 standard sections and 10 special sections, each weighing 73,000 tonnes and measuring 217 metres in length. The sections are assembled on land before being submerged in the Baltic Sea, with the support of a fleet of 60 to 70 vessels.

This project will not only strengthen transportation infrastructure, but will also bring environmental benefits by reducing CO2 emissions and relieving road congestion.

Equipped with railway tracks, ventilation systems, security cameras and signaling, the tunnel is designed to operate for at least 120 years, ensuring an efficient and long-lasting link between Scandinavia and the European continent.


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