The Pedralba and Berroy tunnels belong to the road section of the N-260 Pyrenean Way between the towns of Sabiñanigo and Fiscal. The Cerro de Berroy tunnel is a double-lane tunnel which pierces the Cancias mountain range, 163 m long. It is the second most emblematic project after the Pedralba tunnel (2598 m) in the province of Huesca.

The engineering of this project was developed by the PERI company, who designed a single steel formwork with articulated modules that could be adapted to the different sections of the construction site without the need to dismantle it. As shown in the images above, Caldibe manufactured this tunnel formwork.