To reduce congestion and to minimise the heavy traffic in the centre of Stockholm, it was decided to build the Norra länken: a five kilometre road around part of the centre of Stockholm, three kilometres of which will be in tunnels.
The project consists of a 1.8 kilometre cut and cover tunnel, consisting of mechanical and electrical installations, several road and railway bridges (including railway bridges at Langenæs, Åhavevej and Viby Ringgade), and all temporary structures.