The railway tunnels through Hallandsas, in southwestern Sweden, were officially opened on 08.12.2015. The tunnels are the country’s most important railway infrastructure project in 40 years. It took 10 years and an investment of €850 million to complete them. Vinci Construction Grands Projets and its Swedish partner Skanska bored through a complex geological formation to construct two parallel tunnels with a unit length of nearly 5,500 m and an interior diameter of about 9 m. Click here and se/26 for tunnelbuilder archive. Visit http://www.trafikverket.se/ and http://www.vinci.com/. 50/15.