S3 (ZVV)

S3 (ZVV)
S3 service passing Irgenhausen towards Wetzikon.
Overview
Type	S-Bahn service
System	Zürich S-Bahn
Status	Operational
Locale	Zürich, Switzerland
Termini	Wetzikon Dietikon / Aarau
Website	ZVV (English)
Operation
Operator(s)	Zürcher Verkehrsverbund (ZVV)
Rolling stock	Re 450 class + double-deck coaches
Technical
Track gauge	1,435 mm (4 ft 8 1⁄2 in)

The S3 is a regional railway service of the Zürich S-Bahn on the Zürcher Verkehrsverbund (ZVV), Zürich transportation network, and is one of the network's services connecting the cantons of Zürich and Aargau.

The core of the service links Wetzikon, in the east of the canton of Zürich, and Dietikon, to the west of Zürich. This core service runs via the Hinwil–Effretikon line, joining the Winterthur–Zürich line at Effretikon. It then runs via the Zürichberg Tunnel and stopping at Zürich Stadelhofen and Zurich Hauptbahnhof, before joining the Zürich–Olten line as far as Dietikon.

At the western end of the service, alternate trains are extended further along the Zürich to Olten line, from Dietikon to Aarau, in the canton of Aargau.

The following stations are served:

All services are operated by Re 450 class locomotives pushing or pulling double-deck passenger carriages.

Over the core route south of Dietikon, the normal frequency is one train every 30 minutes, whilst north of Dietikon, this reduces to one train per hour. A journey over the full length of the service takes 84 minutes, of which some 30 minutes is west of Dietikon.