FCC will be responsible for the integration of Line 3 of the Madrid Metro in the planned remodelling of the Moncloa interchange which will extend the line to Cuatro Caminos (connections with lines 2, 6 and 10). The contract is valued at 30.9 million euros.

This project includes the construction of new platforms at the current Moncloa station for direct communication with the interchange.

It is a complex project involving a total length of 374 m, 190 of which are built in a mine (Belgian Method) and the rest between cut-off walls and piles, with the use of diverse techniques including jet-grouting, micropile umbrellas, etc.