Construction took place on two sides of the road 10.5 m each (one each way, and a section type that had to 3.5 m carriageways (plus hard shoulders), a junction with the A-8 and a tollbooth with 11 cabins and their corresponding maintenance and operation buildings.
The main works activities were:
- Excavation of the Larraskitu landfill site. With a total of 1,607,809 m².
- Completion of the Larraskitu tunnels. Double tunnel, with two carriageways, to on each side, that I joined and have a total length of 1760 m.
- Carried out in the Peñascal toll area. Located in the main over to 250 m. false tunnels, including maintenance office buildings.
- We could also highlight to singular structures. One in the Peñascal area, with an elevated passage of 150 m in length and 4 vanes, and the other in Larraskitu, which is a 7 vane mixed pergola on metallic countries, with a total length of 84 m.