The works for the M4 subway line in Milan continue at full speed
The 2nd of May the tunnel-boring machine that is excavating the new M4 subway line has arrived at Susa Station, completing a new section of the gallery. The tunnel-boring machine started on April 19 from the construction site at the Argonne Station and 14 days later reached the Susa Station, digging 24/7.
http://www.metro4milano.it/