Motorway A1, 8-lane extension, overall project

Year of completion

In progress

Type of intervention


Contracting authority



8-lane extension between the existing interchange HH-Südost and the to be planned interchange Norderelbe. Planning task is the northern section over a total length of 5,27 km. 14 bridge constructions need to be replaced. A high-flyer with a length of 125 m as well as a trough with a length of 490 m are part of the new interchange Norderelbe.



Services Grassl

Preliminary design, detailed design, preparation of tendering, building information modelling

Services provided by engineering consortium

Bestand BW 554