Milan’s M4 Metro Line: a thousand businesses
join Webuild for a sustainable city

A premium supply chain to change Milan’s mobility

1,200 companies serving a work
to change Milan’s mobility

Northern Italian companies at work for the new line, 365 based in Lombardy


The companies of the new driverless metro in Milan from Central Italy


Suppliers based in Southern Italy engaged in a strategic work for the city


The metro that brings Milan closer to Europe

Nearly 1,200 (1,196 to be precise) suppliers and sub-suppliers are working alongside the Webuild Group to provide Milan with a new metro line that will improve sustainable mobility in the fashion and financial capital of Italy.

Nearly 99% of the businesses lending their expertise to the construction of the Blu, or M4, line are Italian. Nearly 940 have their base in the north of the country, 149 in the centre and the remaining 93 in the south. The Lombardy region, where Milan is the capital, is home to the greatest number: 635 or 53% of the total. Emilia Romagna and Lazio are the next two regions from where the most suppliers originate.​

The M4 will be 15 kilometres long and have 21 stations. Its trains will take 30 minutes to travel through the centre, connecting the airport to the east with the San Cristoforo FS station to the west.

It will transport 86 million people a year thanks to the frequency rate of the train service: 90 seconds during rush hour. This high rate will be thanks to the deployment of innovative technology, such as the constant communication between the driverless trains on a wireless network. The risk of accidents will be greatly reduced since a train will know the location of the one ahead of it and the one behind it. The M4 will be able to serve 24,000 passengers every hour in each direction.

Measures are in place to reduce the impact that construction activity at the project’s various sites throughout the city have on the lives of its residents. The earth, mud and other elements excavated by the workers are carried out of the tunnels by conveyor belt rather than trucks. Whenever relics and ruins are uncovered, the superintendency responsible for archeology is summoned. Some of the discoveries are on display at the Archeological Museum of Milan. They will later find home at the De Amicis station when work is complete. So the value that the project brings to the city is evident even before its completion.

These are the numbers of the work that the consortium led by the Webuild Group is carrying out thanks to the contribution of the 1,196 companies in the production chain, almost entirely Italian premium companies that are participating building a metro designed to encourage citizens’ constant participation.