Alternative route for road AS-18 'Cornellana–Cerredo pass”, in the mountain pass of Rañadoiro (Asturias)

The present works have a total length of approximately 3,930 m. Rañadoiro tunnel, one of the most important constructions of the project has a total length of 1,874 meters.

The road originally had a width section of just 6 meters, steep slopes, no berms on both sides of the road and a small tunnel at 1,181 meter high over the sea level frequently closed during winter time due to severe snow storms.

The new road projected has the following features:

• Two 3.50 meter lanes along 4 km approximately, with extra width in the curves and 0.50 meters berms on both sides of the road.
• A new tunnel with a total length of 1,867 meters
• Three bridges with a total width section of 12 meters and the following lengths:
  • Bridge nº1: 100.8 meters
  • Bridge nº2: 81.6 meters
  • Bridge nº3: 100.8 meters