The Øresund Bridge is one of Europe’s most striking feats of modern engineering. Opened to traffic in July 2000, it physically connects Denmark and Sweden across the Øresund Strait and has fundamentally reshaped mobility in the region. While the bridge itself stretches for 7.8 kilometres, the entire crossing—combining bridge, artificial island, and underwater tunnel—extends for a total of 16 kilometres, making it a unique, hybrid infrastructure unlike any other in Europe. Often described as the longest cable-stayed bridge in Europe, the Øresund crossing is also a rare example of a single structure carrying both road and rail traffic. Cars and trucks travel on the upper deck, while trains run on a lower level, seamlessly linking the Danish and Swedish railway networks. This dual-use design reflects the project’s original ambition: to unite two countries not only symbolically, but also economically and socially.
A Three-Part Infrastructure Across the Øresund Strait
The Øresund link is composed of three distinct sections, each designed to address specific technical, environmental, and logistical challenges. The first section is the cable-stayed bridge, which begins near Malmö, on the Swedish coast. At 7.8 kilometres long, it is the longest cable-stayed bridge in Europe. Its central span measures 490 metres, allowing large ships to pass beneath, while its two main pylons rise to a height of 208 metres, dominating the skyline of the strait. From the bridge, traffic reaches Peberholm, a four-kilometre-long artificial island built entirely from material dredged during the construction of the tunnel. Peberholm acts as the transition point between bridge and tunnel, but it also plays an unexpected ecological role, as it has been left completely untouched by human development. The final section is the Drogden Tunnel, a 4.1-kilometre submerged tunnel that runs beneath the seabed to the Danish island of Amager, just a few kilometres from Copenhagen. Constructed from 20 massive prefabricated reinforced-concrete elements, the tunnel was assembled in a trench excavated on the seabed and lies about 11 metres below the water surface.
A Bridge on Two Levels: Road and Rail Together
One of the Øresund Bridge’s most distinctive features is its two-level configuration. The upper deck carries a four-lane motorway, part of the European route E20, providing a direct road link between Copenhagen and Malmö. Beneath it, the lower deck hosts a double-track railway line, enabling high-frequency passenger and freight services between Denmark and Sweden. This integration of road and rail into a single structure was both an engineering challenge and a strategic decision. It reduced the overall environmental footprint of the crossing while maximising its capacity and long-term usefulness. Today, tens of thousands of commuters rely on the rail connection each day, making the bridge a backbone of the transnational Øresund Region.
Why Bridge, Island, and Tunnel?
The decision to divide the crossing into three sections was driven by several critical factors. From a financial perspective, a single, continuous tunnel would have been prohibitively expensive, while a bridge spanning the entire strait would have required much taller pylons and longer spans. Air traffic safety also played a key role. Copenhagen’s Kastrup Airport lies close to the Danish shore, and a higher bridge structure would have interfered with flight paths. The tunnel solution near Denmark avoids this issue entirely, while the bridge section near Sweden accommodates maritime traffic.
An Accidental Nature Reserve
Beyond its transport function, Peberholm has become an unexpected ecological experiment. Since no buildings, roads, or permanent human presence were allowed, the island has gradually been colonised by plants, insects, birds, and small mammals. Today it hosts hundreds of species, turning a by-product of heavy engineering into a surprisingly rich natural habitat and a living laboratory for biologists.
Criticism and Controversy
Despite its success, the Øresund Bridge has not been free from criticism. One of the most debated aspects is the toll, which for private cars can exceed €60 for a single crossing. These high fees are largely the result of the substantial debt incurred by the Øresund Consortium, the binational body responsible for financing and operating the infrastructure. The toll policy also serves a second purpose: discouraging unnecessary tourist traffic. By keeping prices high, the bridge is primarily used by commuters and essential transport, while leisure travellers often opt for flights or ferries on other routes. Environmental concerns were another major point of contention, particularly during construction. Large-scale dredging, excavation, and concrete placement inevitably disrupted marine ecosystems. While the creation of Peberholm has partly offset this impact, critics argue that the underwater environment suffered long-term consequences that cannot be fully reversed.
A Landmark of Nordic Engineering
More than twenty-five years after its inauguration, the Øresund Bridge remains a symbol of Nordic cooperation and technical ambition. It is not just a way to cross a stretch of water, but a carefully balanced system where engineering, economics, transport planning, and even ecology intersect. In doing so, it has redefined what a “bridge” can be in modern Europe.
The books suggested in this article are linked to Bookshop.org, an online bookstore whose mission is to financially support local, independent bookstores in the US and UK: we at ATN believe that indie bookstores are essential to a healthy culture. When you buy through these links, a small percentage of the (unchanged) price helps us keeping All Things Nordic free for all users
