B3 Südschnellweg, Hanover

Rehabilitation work began on the historic B3 traffic axis that runs through the Lower Saxony state capital of Hanover in 2023. The bidding consortium PORR/Stump-Franki Spezialtiefbau/Hagedorn was awarded the contract for upgrading the first major section of the Südschnellweg (southern expressway) by the Niedersächsische Landesbehörde für Straßenbau und Verkehr (Lower Saxony State Authority for Road Construction and Transport). The order volume is approximately 400 million euros.

Road tunnel to replace bridge

First constructed in 1954, with two lanes in each direction, the Südschnellweg is still the only east-west link in the south of Hanover that is both efficient and flood-free.

As part of the rehabilitation measures, the bridge across Hildesheimer Strasse and Schützenallee in the Döhren district is now being replaced by an underpass. The consortium will first build a 940m-long temporary bridge parallel to the elevated road and then demolish the existing bridge. A 1,100m-long road tunnel with ramp structures will then be constructed as an underpass below Hildesheimer Strasse and Schützenallee.