| Commuter rail|
| Milan suburban railway service|
Treno Servizio Regionale
Lodi railway station, Saronno railway station
The S1 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 operates over the infrastructure of the Milan–Saronno, Milan Passante and Milan–Bologna railways. Like all but one of the other Milan suburban railway service routes, it is operated by Trenord.
Line S1 (Milan suburban railway service) Wikipedia
Line S1, a cross-city route, heads in a southeasterly direction from Saronno to Milano Lancetti. From there, it runs via the Milan Passante railway through the municipality of Milan to Milano Rogoredo, and finally to Lodi.
The S1 was activated on 12 December 2004, and operated initially between Saronno and Milano Porta Vittoria.
With the change of timetable on 15 June 2008, the line was extended from Milano Porta Vittoria to Milano Rogoredo, where there is interchange with regional trains and long-distance services to and from Genoa, Bologna and Mantua.
To coincide with another timetable change on 13 December 2009, the line was further extended, from Rogoredo to Lodi, during the day between rush hours. From 13 June 2010, all other Monday to Friday services were extended to Lodi.
The stations on the S1 are as follows (stations with a coloured background are within the municipality of Milan):
As of 2012, S1 trains ran half-hourly between 06:00 and 21:00 Monday to Friday.