This report is an integral part of the preliminary design for the construction of a road connection between the Caudina Valley, commissioned by the Provincial Administration of Avellino. This document specifically concerns the preliminary definition of the cross-sections in advancement of both the artificial and natural tunnels. A significant part of the route is developed in a tunnel with the dual purpose of minimizing the impact of the new infrastructure on the territory and minimizing the gradients necessary to cross the Monte Partenio promontory. Four different types of tunnels are planned, differing in geometry and total development. All tunnels foresee, near the entrances, the construction of approaches with an “artificial” methodology, that is, with open-cut excavation, to be circumscribed in their extension based on the presence or absence of pre-existing elements to be preserved or not.