Guadarrama Tunnel

The project consisted of the construction of a railway line for trains with a speed of 350 km/h. The $780-million project consisted of the construction of a railway line for trains with a speed of 350 km/h, including two tunnels of 15 km and 13 km in length, and 8.5 m of connection galleries every 250 m. Half of each tunnel tube was excavated using two double-shield TBMs. 

The project includes infrastructure, superstructure, civil works for railway installations, replacement of utilities and services, environmental integration, non-railway installations and ancillary works.