Transformation of the Anne de Bretagne Bridge in Nantes, France.

Nantes, located in the northwest of France, is famous for its Machines, monumental structures in the shape of animals, which line the island of Nantes for the pleasure of the curious. Soon, one of the city's structures will also grow in size: the Anne de Bretagne Bridge, which connects the city center to the island, will be transformed and expanded to triple its current size. 

To allow this transformation, Freyssinet France will take part in the modification and strengthening of the existing structure by carrying out the following works:

– Lifting by jacking of existing deck

– Modification and lowering of pile heads

– Change of bearings and joints

– Lowering of the deck

– Implementation of additional prestressing

Main innovations of this urban transformation project:

  • The deck, thus modified and lowered, will have a reduced slope and will be able to accommodate future tramway lines. Additional prestressing will allow the structure to adapt to its new use.
  • The other urban challenge is to develop new walkable spaces that can accommodate all types of public (pedestrians, cyclists, children’s pushchairs, motorists, etc.), offering multiple experiences with the belvedere, the hanging garden and its vegetated cushions, the duckboard opening, the landscaped surroundings, the vast public square and a calmer traffic flow. The new bridge will devote 90% of its surface to soft mobility.
  • #sustainabletechnology: the modification of the existing structure allows to keep 4800 T of concrete. In addition, the steel structure will be transported via the Loire river, avoiding the traffic of around 200 trucks.


The work will start at the end of 2024 and will be completed in 2027.

GTM OUEST – VINCI Construction France: leader of the consortium

DODIN CAMPENON BERNARD: member of the consortium

Dietmar Feichtinger Architectes: architect

SCE Amenagement & Environnement: design & engineering

schlaich bergermann partner sbp: design & engineering

3D renderings: Dietmar Feichtinger Architectes