Open invitation to tender, deadline 31/05/2023, for the construction of the 2km bi-tube tunnel in Friburg on the B31 between Kronenbrücke (west) and Ganterknob (East). The tunnel will be connected with the Schuetzenallee tunnel. The tunnel section of B31 will be updated like the A860 motorway. For tender documents click here, where tender must be sent. Duration of the contract is 18 months. Contact Autobahn GmbH des Bundes - NL Südwest, Stuttgart, email vergabe.suedwest@autobahn.de. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=265914-2023. Ref.n. A.03502.10.018. 18/23.
