The Asti-Cuneo Highway Connection – Lot II.6.a project involves the construction of a road section connecting the Asti Est toll booth on the A21 with the Marene toll booth on the A6. The route, which alternates between embankments, cuttings, and half-height sections, crosses the Rio dei Deglia, the Enel canal, and the provincial road SP7 through a series of engineering structures, while the Rio San Giacomo is crossed via a hydraulic box culvert.

The most significant structure in the project is the SP7 viaduct, which is 399.65 meters long, with spans reaching up to 65 meters. The deck, of a mixed steel-concrete open-box design, features beams with a height of 2 meters and inclined external webs. The structure follows a continuous beam static scheme, with Y-shaped reinforced concrete piers. The piers consist of vertical shafts up to a certain height, then split into two inclined arms, connected at the top by a trapezoidal-section transverse beam that supports the central deck girder.

Other key infrastructure elements include the single-span bridges over the Rio Deglia, Opera 3, and the Enel canal, with lengths of extra, 40 meters, and 33 meters, respectively. These decks are also of a mixed steel-concrete design, consisting of two main girders, a central spine beam, and non-collaborating double-T diaphragms, with the slab cast in place on a metal formwork.

Stormwater collected on the roadway will be conveyed through an underground pipe system running along the platform or at the base of the embankment. Instead of being directly discharged into receiving water bodies, it will be treated in dedicated treatment basins to prevent pollutant dispersion.

A fundamental aspect of the project is ensuring the effective landscape and environmental integration of the infrastructure. This will be achieved through slope reshaping, vegetation planting, and green space development. Additionally, measures to protect local wildlife are planned, including an ecoduct designed to restore ecological continuity between areas separated by the highway and a bat-bridge to facilitate bat navigation. The project also includes the creation of pedestrian and cycling paths to promote sustainable mobility and respect for the natural environment.