The Fehmarnbelt Tunnel, the world’s longest submerged tunnel, will link Denmark and Germany. The first concrete section, measuring 217 metres in length, was lowered to the seabed in early May.
Copenhagen's 170-kilometre-long S-Bane network will be operated by driverless trains.
The PERI formwork technology, which is also known on the domestic market, is also used to make the German-Danish project a reality.