Cobra IS, a Vinci subsidiary, has signed a DKK4 billion (US$585 million) contract for the 18-km-long Femern tunnel between Germany and Denmark.

Cobra IS will be responsible for the design, build and maintenance of the project. The contract focuses on ventilation, lighting and safety systems, plus maintenance for the electromechanical systems in the five tubes of the tunnel (two for highway road, two for high-speed rail, and one for service gallery) over the next 6 years.

The Femern tunnel is being built 40 m below the surface of the Baltic Sea and once completed, will become the longest road and rail immersed tunnel in the world. The construction started in 2020 and its commissioning is expected to be completed in 2029.