Road concession with 24 km of extension in an area of very rugged orography, which includes a tunnel with more than 5 km of extension. Scope of services included the Detailed Design Review of 12 bridges, with spans up to 148m, total lengths that vary from 60m to approximately 940m, raising in some cases to more than 130m above the ground, 43 over and underpasses and several retaining walls.