With a length of 10.4 km, this section, developed by OHLA, runs through challenging terrain, which required the construction of five viaducts. Along its route, the A-8 reaches its highest point in Galicia, at an elevation of 698 meters above sea level, at O Fiouco, where it was necessary to install an advanced beaconing system to ensure traffic guidance under low visibility conditions. This section, together with Mondoñedo-Lindín, was one of the last remaining stretches under construction of the Cantabrian Motorway in Galicia.

The project also includes four overpasses, seven underpasses —featuring frame, portal and double-deck typologies— and the construction of five retaining walls, three with reinforced soil and two made of reinforced concrete, completing a technically complex infrastructure.