|Locale||Milan metropolitan area, Italy|
|Website||Trenord (in Italian)|
|Rolling stock||Treno Servizio Regionale|
|Opened||12 September 2016|
|Line length||22.4 km (13.9 mi)|
|Track gauge||1,435 mm (4 ft 8+1⁄2 in)|
|Electrification||3 kV DC|
The line S12 (Italian: Linea S12) is a commuter rail route forming part of the Milan suburban railway service (Italian: Servizio ferroviario suburbano di Milano), which converges on the city of Milan, Italy.
The route runs over the infrastructure of the Milan Passante and Milan–Piacenza railways. Like all but one of the other Milan suburban railway service routes, it is operated by Trenord.
Line S12, a cross-city route, heads initially in an southerly direction from Milano Bovisa through the Milan Passante railway to Milano Rogoredo. From there, it turns south-east towards its southern terminus, Melegnano.
The route was activated on 12 September 2016.
The stations on the S12 are as follows (stations with a coloured background are within the municipality of Milan):
|Milano Porta Garibaldi||1963||
|Milano Porta Venezia||1997|
|Milano Porta Vittoria||2004|
|San Donato Milanese||2003|
|San Giuliano Milanese||1931|