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A 146 km long section of the dual-carriageway “Santo Tomé del Puerto – Burgos” A-1 Motorway located in an important North-South corridor connecting Madrid with the regions of Cantabria, Basque Country, La Rioja, Navarra and with France via Irun. The project was procured as a shadow-toll Design-Build-Finance-Operate (“DBFO”). The Concession Agreement was signed in 2007 between the Contracting Authority and Autovía Arlanzón for a concession period of 19 years ending on the 27th of December 2026. Construction works for the Project mainly consisted of upgrading links, paving, widening of curves and intersections and other works aimed at improving the overall quality and safety standards of the motorway, and were completed in 2012.