Madrid and Segovia. Spain
AP-6 TOLL MOTORWAY. SECTION: VALLE DE LOS CAÍDOS INTERCHANGE - SAN RAFAEL
Third Guadarrama tunnel: 3.2 km long with 14 escape galleries totalling 2,200 m between the 3 tubes. 124 m2 horseshoe cross-section with an equivalent diameter of 6.3 m.
Construction method: New Austrian Method (NATM) by drill-and-blast.
Geology: granites and gneisses.