The tunnel, which will result primarily from the overbuild of a widened eight-lane motorway, is the longest of the three Hamburg ‘lids’ designed to protect residents from noise and pollution. As well as significantly reducing residents’ exposure to continual noise, the allotments, parks and gardens created on the tunnel roof will provide a greener environment, reconnecting the two neighbouring districts of Othmarschen and Bahrenfeld.
Implenia will manage the project commercially as part of a working group, while Hochtief will be the technical lead. Work is due to start in April 2021 and take eight years to complete.
