Warnow Tunnel

The construction cost of 220 million euros was financed by Bouygues Travaux Publics (France), Macquarie Infrastructure Corporation (Australia), and 14 banks.

[1] It was inaugurated on 12 September 2003 by the Federal Transport Minister Dr. Manfred Stolpe.

On 15 August 2018, Atlas Arteria announced an agreement to acquire the remaining 30%.

In November 2015, the fare to cross the tunnel was raised to cope with high maintenance costs.

[3] The tunnel was built using a technique known as immersed tube construction: the main part of the tunnel consists of six prefabricated concrete conduits which were formed and poured in a temporary drydock nearby, floated out into the river and lowered into a dredged channel in the river bottom.