Øresund Bridge#Drogden Tunnel

The Øresund/Öresund/Oresund Bridge is a combined railway and motorway bridge across the Øresund strait between Sweden and Denmark. The bridge runs nearly 8 kilometres from the Swedish coast to the artificial island Peberholm in the middle of the strait. The crossing is completed by the 4-kilometre Drogden Tunnel from Peberholm to the Danish island of Amager.
The Øresund Bridge is the longest combined road and rail bridge in Europe and connects two major metropolitan areas: Copenhagen, the Danish capital city, and the Swedish city of Malmö. It connects the road and rail networks of the Scandinavian Peninsula with those of Central and Western Europe. A data cable also makes the bridge the backbone of internet data transmission between central Europe and Sweden/Finland.

Wikipedia