Metro line M4, Milan


Milan’s new Line 4 subway is planned to connect the south-western neighborhood of Lorenteggio with the Linate Airport on the east, passing through the city center. This fully automated driverless rapid transit line runs for a total of 15 kilometres, with 21 stations featuring automatic platform doors.


Municipality of Milan


Architectural Design. Engineering. Traffic Engineering. Project Management.


Milan, Italy

Project Team

Team: Impregilo, Astaldi, Ansaldo STS, Ansaldo Breda, ATM, Sirti

Technical Data

Length: 15 km
Stations: 21
Service frequency: 1 train / 90 sec
Capacity: 24,000 pax/hour
Value of works: EUR 1.5 billion
Metro System Ridership: 425 million pax / year