Milan Metro M1

Ghella is involved in the construction of the western extension of Milan’s Red Line (M1), a 3.3 km section running entirely underground. Starting from the existing Bisceglie station, the route will pass through the districts of 
Valsesia, Baggio and Olmi, including three new stations (Parri, Baggio and Olmi), six line-side structures and a new train depot. The extension will be constructed almost entirely using TBM technology. The tunnel boring machine will excavate from west to east, towards the city centre. It will be launched from the Pertini worksite and retrieved at the 
Parri structure, near Bisceglie.  

The project incorporates a number of highly innovative solutions. These include advanced fire prevention and protection systems designed to achieve the highest safety standards. Examples include the application of Fire Safety Engineering principles to smoke and heat extraction systems and station evacuation routes. 
With the extension of the M1 line, Milan is taking a significant step towards expanding metro services in the western part of the city. The project is a strategic investment that strengthens the public transport network in a densely populated area and improves accessibility for residents, providing a practical alternative to private vehicle use while supporting sustainable mobility, and responding to local needs. The plans for the redevelopment of the surface areas surrounding the works include substantial environmental and public green space improvements around the new 
stations. The aim is to create accessible and usable public spaces that are central to community life and enhance the liveability of the neighbourhoods.

Benefits

1. Extension of public transport services to several city districts.
2. Reduction in road congestion.
3. Reduction in greenhouse gas emissions.
4. Reduction of 14 million kilometres of private vehicle traffic per year.
5. Reduction of 3,500 tCO₂eq per year.6. Approximately 7.5 million users per year.