Tranche 854 "Underground works and cut-and-cover tunnel in Vezia" forms the Ceneri Base Tunnel entrance in Vezia, consisting approximately of the first 550 m of tunnel from south to north. It is mainly divided into three categories of works: underground works, open-air tunnel, external works, and final restoration of the sites. The underground works include creating a tunnel using traditional blasting methods, with two single tubes (2 x 340 m) and a transverse passage. The cut and cover tunnel is a box-like construction in reinforced concrete with a length of 220 m and a cross-passage. The final restoration of the site involves infilling above the cut and cover tunnel, and completion of the parking area. Also provided are the ducting of a road, construction of some retaining walls, and the construction of a new local link road.