Milan M4 metro line: TBM arrival at Solari station completes excavation of one tunnel on western end
(WorldNews Italy)

MILAN, June 26, 2019 - A new milestone has been reached on the M4, the metro line being built in Milan by a consortium led to Salini Impregilo. The arrival of the first tunnel-boring machine (TBM) at the future site of Solari Station marks the end of the excavation work and laying of precast concrete segments in...