The Ínsuas viaducts cross the Ínsuas Valley in the Fafe South interlink node of the A7 motorway (toll road). This group of viaducts comprises a viaduct in the main road and three viaducts in the motorway access branches A, D and B.
Each of all decks is constituted by a slab and two longitudinal girders without cross-beams. The spans vary from 20 to 35 meters. The total length of each of the viaducts varies between 52m and 381m.
The decks are supported by one pier under each girder. All piers have direct foundations.
Construction was completed in 2004.