The intervention is part of the work recognized as being of national strategic interest, specifically the complementary road network for the Genoa/Milan High speed railway line known as the Third Giovi Pass. The High-speed Train line of Liguria has the objective to expand the connections of the port system in Liguria with the main railway lines in northern Italy and the rest of Europe. It is 53 kilometers long, 37 of which are in tunnels. As in all major road works, so-called “compensatory” works for the inconvenience caused to the territories of the works are planned. Cipa has been an operational part of the road network that runs along the Val Chiaravagna and the junction on the A10 Genoa Airport in Genoa; through the construction of a road section that can be considered divided into two distinct sections. The first section is detached from via Chiaravagna in proximity of the existing railway viaduct and with a new gallery named “Chiaravagna”, of a length equal to 314mt, it ends with a roundabout in Via Borzoli, a stretch that allows the conjunction with the existing urban viability. The second section connects the above mentioned roundabout with the existing road network in Erzelli, next to the A10 Genoa-Savona motorway exit “Genova Aeroporto”. The track of the road network is mainly in tunnels and in particular, it consists of two natural tunnels in succession: “The Borzoli” tunnel about 160.70 m long and the “Erzelli” tunnel, about 847,20 m long; the tunnels are separated by an open-air section in correspondence with the area of a former quarry. The intersection of the track with the River Zoagli, located at the outdoor section, has been solved by collecting the same river in an artificial canal overhanging the roof of the artificial gallery on the quarry side. In the final track Erzelli side, the track, after having crossed over the “don Guanella” tunnel of the A10, is located in the hillside upstream of the industrial area, thus allowing the connection to the ordinary road network that takes place through a roundabout. The tunnel “Chiaravagna” has a road section consisting of 2 carriageways of width mt 3.50 and two quays of width mt 1.25 and the internal radius of the tunnel canopy is mt 6.0 and develops entirely in the formation of the Argile of Ortovero, characterized from a geotechnical point of view as fine-grained soils with little evident stratifications. Along the track we can preview some conglomerates and basal breaches that can interpose locally to the clays. The “Borzoli” tunnel is developed in a single curved section, while the “Erzelli” consists of three sections, one of which is straight, whose standard road sections are identical to the one described for the “Chiaravagna” tunnel. There are also two pitch areas, 65m long, with a section with an internal radius in the canopy of 7.57m. The two galleries develop entirely in the basalts of the Timone-Teiolo unit, characterized, from a geotechnical point of view, as rocks and basaltic breaches recently fractured to altered and tectonized in the fault zones. Cipa also took charge of the realization of the bridge who crosses the Chiaravagna torrent and consists of two shoulders and a single steel deck that allows the connection between the entrance of the Chiaravagna tunnel and Via Chiaravagna. The work in its logic, as said compensatory, represents an enormous benefit for the roads in the Sestri Ponente area since it eliminates all heavy traffic allowing local traffic to pass to the old Aurelia roadway.