The excavations of the tunnels of the interconnection have been completed railway of Novi Ligure with the demolition of the last diaphragm, the connecting point that grafts onto the historic Genoa-Turin line the new high-capacity line of the Terzo Valico dei Giovi, on the Genoa-Milan route. Webuild, which is at the helm of the general contractor of the work, underlined that this interconnection is a key element of the project overall. The infrastructure is developed from the tunnel of Serravalle, entirely underground, through two new natural single-track tunnels, for a total length of 1,700 metres: 723 metres for the odd-numbered track tunnel and 987 metres meters for that of the even track. The two pipes branch off into the underground until you reach the historic line nearby of Novi Ligure, making it possible to enter trains, both passengers and freight, in the direction of Turin and the reverse route without interference with urban viability and traffic existing railway system.

Webuild specified that the construction site involved an area of almost seven hectares and that the work was carried out in as the tunnels run at shallow depths and are located a few meters away from the railway line Genoa-Turin, which has always remained active with minimal interference with the railway traffic.