Milan Metro Line 4
| M4 | |||
|---|---|---|---|
| Overview | |||
| Status | Operational | ||
| Locale | Milan, Italy | ||
| Connecting lines | |||
| Stations | 21 | ||
| Website | Official website | ||
| Service | |||
| Type | Rapid transit | ||
| System | Milan Metro | ||
| Operator(s) | Azienda Trasporti Milanesi | ||
| Rolling stock | Hitachi Rail Italy Driverless Metro | ||
| Daily ridership | 40,000 (July 2023-February 2024) | ||
| History | |||
| Opened | 26 November 2022 (first phase) | ||
| Last extension | 12 October 2024 (full line) | ||
| Technical | |||
| Line length | 15.2 km (9.4 mi) | ||
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | ||
| Electrification | 750 V DC third rail | ||
| |||
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.
The line was opened in stages between 2022 and 2024. It features automatic driverless trains and is designed for a capacity of 24–28,000 passengers per hour in each direction. The expected annual ridership is 87 million.