The project concerns the N2 highway section between km 48,500 and km 56,000, including the Bellinzona Nord junction (N02-N13), with rehabilitation of: road superstructure, buildings, water evacuation system, safety barriers and fences, electromechanical installations, signs and noise barriers and construction of 3 new road wastewater treatment plants (SABA). This is a complete rehabilitation project that concerns the FEDRO sectors T/U (environment), K (artefacts) and T/G (tunnel and geotechnics). The services concern those relating to following phases: intervention project (MP), detailed project (DP), contract (S) and execution of the intervention (B), including the resumption of the Intervention Concept (MK).