Girona, Spain

C-37 Les Preses and Olot bypass

Client / Generalitat de Catalunya



Construction budget

EUR 235 million

Key facts

This 11 km bypass will allow some 20,000 vehicles to avoid Les Preses and Olot town centres every day. The road, which runs close and parallel to the Rivers Fluvià and Ridaura, is designed considering landscape integration and protected areas of natural interest.

The road crosses La Garrotxa volcanic area through a 2.5 km two-way tunnel and the Fluvia River on a 420 m viaduct.

Design of 3 ecoducts (underground cut and cover tunnels) across important agricultural and wildlife areas, each about 900 m long.

Design of the final 400 m underground section under existing roads.


Detailed design, including landscape integration study, traffic study and flood risk study.