Portuguese 
English 
Spanish 
3 min of reading 
0 comments 
With 18 Km Of Extension And An Investment Of €8 Billion, The World’s Largest Undersea Tunnel Will Connect Germany And Denmark In Just 7 Minutes, Replacing The Ferries That Take 45 Minutes – And It Will Be Ready By 2029!
Traveling between Germany and Denmark will never be the same. By 2029, the world’s largest undersea tunnel will be ready to shorten the journey between the two countries, connecting the cities of Puttgarden and Rødbyhavn across the Fehmarn Strait. With 18 kilometers in length and 30 meters in depth, the tunnel promises to revolutionize transportation in the region.
The construction, which began in 2020, will replace the ferry service, reducing the crossing time from 45 minutes to just 7 minutes by car or train. But this grand construction is not only about speed — it is a landmark in engineering and connectivity in Europe.
The Fehmarn Strait Tunnel: The Connection Between Germany And Denmark
Currently, crossing the Fehmarn Strait requires a long wait for the ferries that make the journey between the two countries. With the construction of the tunnel, this reality will change radically. Drivers and passengers will be able to cross the border within minutes, making travel faster and more efficient.
-
While Brazil has been dragging its feet on the Rio-São Paulo bullet train for 30 years, California has turned its own into a zombie project: 18 years, $126 billion, 60 viaducts completed, and zero meters of track laid, with Trump cutting $4 billion in July.
-
While Brazil has been discussing the Maracanã renovation for 25 years and struggles to keep the Arena MorumBis open, Abu Dhabi signs a $1.7 billion deal to build the world’s second Sphere on an artificial island, with 20,000 seats, by 2029.
-
The Brazilian state will receive its own submarine cable and a billion-dollar supercomputer, and the state will no longer rely exclusively on Ceará, which currently handles 90% of all internet traffic circulating in Brazil.
-
Engineers had to pour concrete mixed with tons of ice throughout entire nights in the Dubai desert to erect the Burj Khalifa; any carelessness could clog the pipes half a mile high.
The tunnel will include two railway tracks and lanes for vehicles, ensuring optimized traffic flow for freight and passengers.
Structure And Engineering Of The Largest Undersea Tunnel In The World
With an estimated cost of €8 billion, the structure will be one of the most innovative ever built. The tunnel will consist of prefabricated modules that will be installed at the bottom of the Baltic Sea. Construction began on the Danish side, in Rødbyhavn, in 2020, and the following year, work advanced to Puttgarden, in Germany.
To ensure its durability, the infrastructure has been designed to last at least 120 years, withstanding the intense daily traffic of trains and vehicles.
Investments And Financing Of The Project
The project is primarily funded by the governments of Denmark and Germany, but it also has support from the European Union. By 2024, through the CEF fund (Connecting Europe Facility), the project has already received €1.3 billion.
The construction of the largest undersea tunnel in the world is not just a matter of infrastructure — it is a significant step toward boosting the region’s economy. The direct connection between the countries will stimulate trade, increase tourism, and facilitate the transport of goods.
With the collection of tolls, the countries will be able to recoup part of the investment and keep the tunnel in perfect working condition for decades.
The Construction Timeline Until 2029
Since the beginning of the construction, the project has been progressing as planned. In February 2024, the first two modules of the tunnel were moved from the shipyard to the assembly basin, a significant milestone for the continuation of the work.
The year 2025 will be crucial, as it will mark the beginning of the installation of the main structures of the tunnel. The expectation is that by 2029, all stages will be completed and the submerged crossing will be officially open to the public.
Be the first to react!