The Fehmarnbelt tunnel, the world's longest pre-fabricated road and rail tunnel, is currently under construction, promising significant reductions in travel time between Hamburg and Copenhagen. Set to complete in 2029, the project, while meeting some ecological challenges, is anticipated to bolster the local economies and facilitate greener transport options.
Under the Baltic: Denmark-Germany Tunnel to Transform Travel and Economy

Under the Baltic: Denmark-Germany Tunnel to Transform Travel and Economy
A groundbreaking undersea tunnel connecting Denmark and Germany aims to revolutionize transportation and reduce travel times, bridging Scandinavia and Central Europe.
The Fehmarnbelt tunnel, a monumental engineering project currently underway beneath the Baltic Sea, is poised to enhance travel connectivity between Denmark and Germany. Stretching a remarkable 18 kilometers (11 miles), the tunnel will become the longest pre-fabricated road and rail tunnel globally, aiming to streamline travel across Scandinavia and into mainland Europe.
The tunnel construction boasts a unique design, featuring segments that are placed directly on the seafloor and subsequently assembled. The primary construction hub, located at Lolland island's northern entrance, encompasses an expansive 500-hectare (1,235-acre) area, accommodating a harbor and a factory for manufacturing the tunnel's sections, termed "elements."
Henrik Vincentsen, chief executive of Femern, the state-owned entity behind the project, emphasizes the scale of this undertaking, highlighting the innovative approach that resembles Lego bricks in its assembly methodology. The total cost for this ambitious project is approximately €7.4 billion ($8.1 billion), a majority funded by Denmark with the European Commission contributing €1.3 billion. This infrastructure milestone forms part of a broader EU strategy aimed at bolstering transportation links while advocating for reduced air travel.
Once operational, the commute between Rødbyhavn in Denmark and Puttgarten in Germany is expected to reduce to just 10 minutes by car or 7 minutes by train, replacing a traditionally lengthy 45-minute ferry journey. Furthermore, the new rail pathway is projected to halve the time for travelers between Copenhagen and Hamburg, offering a more efficient and eco-friendly transit option.
Vincentsen notes the tunnel's significance in linking Denmark to Germany and expanding routes from Scandinavia to Central Europe, asserting, "Everybody's a winner". The project’s impact extends beyond transportation, aiming to lessen carbon emissions by shortening travel distance.
Located at the tunnel's entrance, enormous steel doors currently hold out seawater as construction progresses. Senior construction manager Anders Gert Wede elaborates on the intricate process of lowering these massive segments, weighing over 73,000 tonnes, into a precisely dug trench on the seabed using advanced underwater technology. Synchronicity is crucial as it involves reducing the elements into place with exact alignment.
Geologists initially considered building a bridge, but various environmental and logistical concerns steered the decision towards an immersed tunnel design, deemed more secure and sustainable. The collaborative agreement between Denmark and Germany to move forward with the tunnel was reached in 2008, though not without delays due to ecological opposition. Environmentalists, including the Nature And Biodiversity Conservation Union (Nabu), raised concerns about potential threats to local wildlife and habitats. However, a 2020 court ruling allowed construction to proceed, leading to new ecological initiatives aimed at mitigating environmental repercussions.
Expected to open by 2029, the project predicts daily usage of over 100 trains and 12,000 cars. Planned toll revenues will assist in repaying loans associated with the construction, which is anticipated to take around four decades to recoup. This venture is also expected to stimulate local employment and tourism in Lolland, an economically challenged area in Denmark.
As the construction continues, Wede, with personal ties to the region, expresses optimism about the local community's eagerness for new business opportunities tied to the tunnel's eventual opening.
The tunnel construction boasts a unique design, featuring segments that are placed directly on the seafloor and subsequently assembled. The primary construction hub, located at Lolland island's northern entrance, encompasses an expansive 500-hectare (1,235-acre) area, accommodating a harbor and a factory for manufacturing the tunnel's sections, termed "elements."
Henrik Vincentsen, chief executive of Femern, the state-owned entity behind the project, emphasizes the scale of this undertaking, highlighting the innovative approach that resembles Lego bricks in its assembly methodology. The total cost for this ambitious project is approximately €7.4 billion ($8.1 billion), a majority funded by Denmark with the European Commission contributing €1.3 billion. This infrastructure milestone forms part of a broader EU strategy aimed at bolstering transportation links while advocating for reduced air travel.
Once operational, the commute between Rødbyhavn in Denmark and Puttgarten in Germany is expected to reduce to just 10 minutes by car or 7 minutes by train, replacing a traditionally lengthy 45-minute ferry journey. Furthermore, the new rail pathway is projected to halve the time for travelers between Copenhagen and Hamburg, offering a more efficient and eco-friendly transit option.
Vincentsen notes the tunnel's significance in linking Denmark to Germany and expanding routes from Scandinavia to Central Europe, asserting, "Everybody's a winner". The project’s impact extends beyond transportation, aiming to lessen carbon emissions by shortening travel distance.
Located at the tunnel's entrance, enormous steel doors currently hold out seawater as construction progresses. Senior construction manager Anders Gert Wede elaborates on the intricate process of lowering these massive segments, weighing over 73,000 tonnes, into a precisely dug trench on the seabed using advanced underwater technology. Synchronicity is crucial as it involves reducing the elements into place with exact alignment.
Geologists initially considered building a bridge, but various environmental and logistical concerns steered the decision towards an immersed tunnel design, deemed more secure and sustainable. The collaborative agreement between Denmark and Germany to move forward with the tunnel was reached in 2008, though not without delays due to ecological opposition. Environmentalists, including the Nature And Biodiversity Conservation Union (Nabu), raised concerns about potential threats to local wildlife and habitats. However, a 2020 court ruling allowed construction to proceed, leading to new ecological initiatives aimed at mitigating environmental repercussions.
Expected to open by 2029, the project predicts daily usage of over 100 trains and 12,000 cars. Planned toll revenues will assist in repaying loans associated with the construction, which is anticipated to take around four decades to recoup. This venture is also expected to stimulate local employment and tourism in Lolland, an economically challenged area in Denmark.
As the construction continues, Wede, with personal ties to the region, expresses optimism about the local community's eagerness for new business opportunities tied to the tunnel's eventual opening.