S21 (ZVV)

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. 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.

S21
Overview
LocaleZürich, Switzerland
Termini
Stations5
Service
TypeS-Bahn
SystemZürich S-Bahn
Operator(s)Zürcher Verkehrsverbund (ZVV)
Rolling stockRe 450 and double-decker coaches
History
Opened13 December 2015 (2015-12-13)
Technical
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Zürich S-Bahn network as of December 2018[1]

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; there are a total of eight trains in each direction per day. Inbound trains in the morning and outbound trains in the evening bypass Zürich Seebach. Trains stop at the following stations:[2]

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.[3]

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.[4]

References
  1. "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.
  2. "Regensdorf-Watt–Zürich Oerlikon–Zürich HB" (PDF). ZVV. 1 May 2019. p. 24. Retrieved 21 September 2019.
  3. "Neue S-Bahn-Linien für die Region Zürich". Der Landbote (in German). 26 May 2015. Retrieved 8 January 2023.
  4. "Annual formation". data.sbb.ch. Retrieved 8 January 2023.
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