S21 (ZVV)

S21
Trainset at Zürich HB
Overview
LocaleZürich, Switzerland
Termini
Stations4 or 5
Service
TypeS-Bahn
SystemZürich S-Bahn
Operator(s)Zürcher Verkehrsverbund (ZVV)
Rolling stock
  • Re 450 and double-decker coaches
  • Re 420 (LION) locomotives and double-decker coaches
History
Opened13 December 2015 (2015-12-13)
Technical
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
map_name
time
(h)
S6 to Buchs-Dällikon
0:00
 Regensdorf-Watt
S6
0:03
 Zürich Affoltern
(limited service)
S6
S2 S16 S24 to Zürich Airport
S7 to Opfikon
S3 S9 S15 to Oberglatt
S8 S14 S19 to Wallisellen
0:12
 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
0:16
 Zürich Hardbrücke
S3 S5 S6 S7 S9 S11 S12 S15 S16
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
0:22
 Zürich HB[a]
S2 S8 S14 S19 to Zürich Oerlikon
S3 S5 S6 S7 S9 S11 S12 S15 S16 S20 S23 to Zürich Stadelhofen
[1][2]
  1. ^ Zürich HB tracks (Gleis) from left to right: 21–22 (SZU) / 31–34 / 3–18 (surface) / 41–44.

The S21 is a regional railway service of the Zürich S-Bahn of the Zürcher Verkehrsverbund (ZVV). The service operates at peak hours between Regensdorf-Watt and Zürich Hauptbahnhof over the Wettingen–Effretikon railway, supplementing the regular S6 service, which continues west to Baden.

At Zürich HB, trains of the S21 service usually depart from ground-level track (Gleis) 18.

Route

  • S21 Regensdorf-Watt–Hardbrücke–Zürich HB
    Operates only during rush hour; non-stop between Oerlikon and Regensdorf-Watt; morning services to Zürich HB and evening services to Regensdorf-Wall also stop in Zürich Affoltern.

The service operates on weekdays during peak hours, roughly from 6:30 am to 8:30 am and from 4:30 pm to 7 pm; there are a total of eight trains in each direction per day. In the morning only inbound trains stop at Zürich Affoltern, in the evening only outbound trains. Trains usually depart from (or arrive at) one of the surface platforms of Zürich HB. By being overlapped with S6, services between Zürich Hauptbahnhof and Regensdorf-Watt operate with a headway of roughly 10 or 20 minutes respectively. The S21 calls at the following stations:[4]

History

The S21 designation was previously used for service from Zürich to Zug over the Thalwil–Arth-Goldau railway; this is now provided by the S24. The current S21 began running with the December 2015 timetable change.[5]

Rolling stock

As of the December 2022 timetable change, most services are operated by Re 450 class locomotives pushing or pulling double-deck passenger carriages.[6]

See also

References

  1. ^ "S-Bahnen, Busse und Schiffe" (PDF) (in German). Zürcher Verkehrsverbund. 12 December 2021. Retrieved 25 November 2022.
  2. ^ "Zürcher S-Bahn S21" (PDF) (in German). Zürcher Verkehrsverbund. 15 September 2023. Retrieved 7 January 2024.
  3. ^ "S-Bahnen, Busse und Schiffe S-Bahn trains, buses and boats" (PDF). Archived (PDF) from the original on 26 July 2023. Retrieved 26 July 2023.
  4. ^ "Haltestellen- und Linienfahrpläne VBZ (S21)". ZVV. 14 December 2025. Retrieved 12 December 2025.
  5. ^ "Neue S-Bahn-Linien für die Region Zürich". Der Landbote (in German). 26 May 2015. Retrieved 8 January 2023.
  6. ^ "Annual formation". data.sbb.ch. Retrieved 8 January 2023.
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