On 26.09.2013 the company SP M4 Scpa, composed by Impregilo Spa, Astaldi SpA, Ansaldo STA SpA, Ansaldo Breda SpA, Azienda Trasporti Milanesi SpA and Sirti SpA, began site work for the new Forlanini FS station on the M4 metro line in Milan. The M4 will be 15 km-long with 15 stations from Linate Airport to San Cristoforo (Lorenteggio). The new section will open for Expo 2015. Click it/16 for tunnelbuilder archive and here. 39/13.