Line S9 (Milan suburban railway service)

Saronno–Albairate-Vermezzo
An S9 train at Milano Lambrate.
Overview
StatusOperational
LocaleLombardy, Italy
Termini
Stations16
WebsiteTrenord (in Italian)
Service
TypeCommuter rail
SystemMilan suburban railway service
Route numberS9
Operator(s)Trenord
History
Opened2004
Technical
Track gauge1,435 mm (4 ft 8+12 in)
Electrification3,000 V DC
Route map

The S9 is a commuter rail service of the Milan suburban railway service (Italian: Servizio ferroviario suburbano di Milano) that converges in Milan, Italy.

It uses the Saronno–Seregno, Milan–Chiasso, Milan belt, Milan southern belt and Mortara–Milan railway lines, and is operated by Trenord.