Milan Metro Line 4

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M4
San Babila station
Overview
StatusOperational
LocaleMilan, Italy
Connecting lines File:Milano linea M3.svg
Stations21
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Service
TypeRapid transit
SystemMilan Metro
Operator(s)Azienda Trasporti Milanesi
Rolling stockHitachi Rail Italy Driverless Metro
Daily ridership40,000 (July 2023-February 2024)[1]
History
Opened26 November 2022 (first phase)
Last extension12 October 2024 (full line)
Technical
Line length15.2 km (9.4 mi)
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification750 V DC third rail
Route map
File:Milano - mappa metropolitana M4.svg

Line 4 is an underground rapid transit line in Milan, Italy, part of the Milan Metro. The line is 15.2 km (9.4 mi) long with 21 stations.[2]

The line was opened in stages between 2022 and 2024.[3][4] It features automatic driverless trains[5] and is designed for a capacity of 24–28,000 passengers per hour in each direction.[6] The expected annual ridership is 87 million.

Construction

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The first three stations of the line (Linate-Repetti-Forlanini) was originally planned to be completed in 2015, as part of the works for the Milan Expo. However, delays in planning, financing[7] and construction works forced to postpone the opening, with the first section opening on 26 November 2022[3][8] and the rest of the line expected to open by 2023.[9] The line is 15 km (9.3 mi) long with 21 stations, with its final 13 stops opening on 12 October 2024.[10]

The consortium ATM-Webuild is responsible for the construction works.[11][12]

Of the total estimated cost of about €1.7 billion, the Government of Italy will cover €786 million via a grant, the municipal government of Milan will cover €400 million, and €512 million will be funded by private investors.[11]

Route

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File:Maurizio lupi inaugura metropolitana m4 talpa linate 24 marzo 2014 2 (13377872183).jpg
Tunnel boring machines used in the project, 2014
File:ForlaniniFS-metro4.jpg
Forlanini FS station under construction in 2016

The line connects the south-western neighborhood of Lorenteggio with Linate Airport on the east, passing through the city center. All stations are underground.

Station Name Transfer Opening
San Cristoforo FS File:Milano S9 (2025).svg File:Tren.svg 12 October 2024[10]
Segneri
Gelsomini
Frattini
Tolstoj
Bolivar
California
Coni Zugna
Sant'Ambrogio
De Amicis
Vetra
Santa Sofia
Sforza-Policlinico File:Milano linea M3.svg (Missori)
San Babila 4 July 2023
Tricolore
Dateo File:Milano S1 (2025).svg File:Milano S2 (2025).svg File:Milano S5 (2025).svg File:Milano S6 (2025).svg File:Milano S13 (2025).svg 26 November 2022[3]
Susa
Argonne
Stazione Forlanini File:Milano S5 (2025).svg File:Milano S6 (2025).svg File:Milano S9 (2025).svg
Repetti
Linate Aeroporto File:Pictograms-nps-airport-2.svg

Rolling stock

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The line uses Hitachi Rail Italy Driverless Metro automatic driverless trains.[5] The line will be operated by 37 four-car EMUs manufactured by Hitachi Rail Italy at Reggio Calabria. Because of production problems caused by the COVID-19 pandemic, some were sent to Hitachi Newton Aycliffe in England for final fitting out.[13]

See also

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Wikimedia Commons has media related to Line M4 (Milan metro).

References

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  13. ^ Milan Metro cars in Newton Aycliffe The Railway Magazine issue 1436 November 2020 page 9
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