The Cerro de Berroy Tunnel is the second most emblematic work after the Pedralba tunnel (2,598 m) of the new Sabiñánigo-Fiscal highway section by Yebra de Basa. This new section, of about 23 km, has been conceived as the closure of the Pyrenean axis (Cantabrian-Mediterranean / A-21 + N-260) and its opening will bring about savings of 23 km by avoiding having to go to Broto and Biescas, also will avoid many crossings and the complicated port of the Contefablo which in addition to having a very narrow and winding road has frequent traffic problems in winter due to its high altitude (1,423 msm), it is also crowned by the Cotefablo tunnel which is very old and narrow. The new Sabiánigo-Fiscal will be renamed N-260a, while the passage through the Cotefablo will be renamed N-260b. The first plans of this road section date back to 1.936.

The works of the Sabiñanigo-Fiscal began in 2003 and are scheduled to end at the end of 2010 or in the worst cases early 2011, the work that crosses environments of special ecological interest presented numerous delays due to biological strikes to the The serious problems in the drilling of the tunnels of Pedralba and Cerro de Berroy (163 m) were soon added. characteristics

The Cerro de Berroy tunnel will be a modern monotube double-lane road tunnel that will drill the Cancias mountain range, it will be 163 m long. The tunnel of Cerro de Berroy will have a road of 7 meters with two lanes, shoulders of 1.5 meters.

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