The largest Road Infrastructure Project to be undertaken in the Basque Country in the last few years, this project is the solution to the problem of traffic congestion on the south ring road around the city. The work carried out by IDOM involved stretches of the Bypass which included 11km of tunnel sections (two and three lanes in each direction), in addition to 2 junctions and numerous structures, some truly unique. The Project includes equipment areas and the infrastructure control building. The construction budget has been in the order of €450 million.