The S3 is a regional railway service of the Zürich S-Bahn on the Zürcher Verkehrsverbund (ZVV), the Zürich transportation network. It is operated by Swiss Federal Railways.

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S3
S3 service passing Irgenhausen towards Wetzikon in 2010
Overview
Service type	S-Bahn service
Locale	Zürich S-Bahn
Current operator(s)	Swiss Federal Railways
Route
Termini	Wetzikon Bülach
Stops	15
Service frequency	Every 30 minutes
Line(s) used	Effretikon–Hinwil line Zürich–Winterthur line Oerlikon–Bülach line
Technical
Rolling stock	Re 450 class Double-decker coaches
Route map Legend time (h) S9 S36 to Eglisau 0:00 Bülach S9 S36 S41 S41 to Winterthur S15 to Niederweningen 0:05 Oberglatt S9 S15 10 12 to Zürich Airport 0:11 Glattbrugg S9 S15 10 12 to Glattpark S2 S16 S24 to Zürich Airport S7 to Opfikon S6 S21 to Regensdorf-Watt S8 S14 S19 to Wallisellen 0:14 Zürich Oerlikon S2 S8 S14 S19 to Zürich HB S24 to Zürich Wipkingen Käferberg Tunnel (2.12 km) S5 S11 S12 S42 to Zürich Altstetten 0:18 Zürich Hardbrücke S5 S6 S7 S9 S11 S12 S15 S16 S21 S24 to Zürich Wipkingen S14 S19 to Zürich Altstetten S2 S8 S24 S25 to Zürich Wiedikon S4 S10 from Zürich HB SZU to Zürich Selnau 0:21 0:23 Zürich HB[lower-alpha 1] S2 S8 S14 S19 to Zürich Oerlikon Hirschengraben Tunnel (2.15 km) 0:26 Zürich Stadelhofen S5 S6 S7 S9 S11 S12 S15 S16 S18 S20 S23 S18 from Zürich Stadelhofen FB to Esslingen S6 S7 S16 S20 to Zürich Tiefenbrunnen Zürichberg Tunnel (4.97 km) 0:31 Stettbach S9 S11 S12 12 to Zürich Airport Glatttal viaduct S8 S14 S19 to Wallisellen S5 S9 S14 S15 to Uster 0:34 Dietlikon S8 S19 S7 S24 to Bassersdorf 0:40 Effretikon S7 S8 S19 S24 S7 S8 S11 S12 S23 S24 to Winterthur 0:44 Illnau S19 0:49 Fehraltorf S19 0:53 Pfäffikon ZH S19 0:56 Kempten S5 S14 S15 to Uster 1:00 Wetzikon S5 S14 S15 S14 to Hinwil S5 S15 to Rüti ZH [1][2] This diagram: view talk edit Zürich HB tracks (Gleis) from left to right: 21–22 (SZU) / 31–34 / 3–18 (surface) / 41–44.

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At Zürich HB, trains of the S3 service usually depart from underground tracks (Gleis) 41–44 (Museumstrasse station).

• S3 (Bülach –) Hardbrücke – Zürich HB – Effretikon – Wetzikon
  Extended from Hardbrücke to Bülach during rush hour, operating non-stop from Glattbrugg.

The core of the service links Wetzikon, in the east of the canton of Zürich, and Zürich Hardbrücke, in central 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. During peak hours service continues north via the Oerlikon–Bülach railway to Bülach.^[3]

The following stations are served:^[4]

• Wetzikon
• Kempten
• Pfäffikon ZH
• Fehraltorf
• Illnau
• Effretikon
• Dietlikon
• Stettbach
• Zürich Stadelhofen
• Zürich Hauptbahnhof
• Zürich Hardbrücke
• Zürich Oerlikon
• Glattbrugg
• Oberglatt
• Bülach

Up until December 2018, the S3 operated via the Zürich–Baden railway as far as Dietikon, instead of turning north to Bülach. Alternate trains continued further along the Zürich to Olten line, from Dietikon to Aarau, in the canton of Aargau.^[5] An extended S11 replaced the S3 between Hardbrücke and Aarau.^[6]

As of the December 2022 timetable change,^[update] all services are operated Re 450 class locomotives pushing or pulling double-deck passenger carriages.^[7]

Over the core route between Wetzikon and Hardbrücke, the normal frequency is one train every 30 minutes. A limited number of trains operate to and from Bülach during peak hours. A journey over the full length of the service takes 60 minutes.^[4]

• Rail transport in Switzerland
• Trams in Zürich