S20 (ZVV)
The S20 is a railway service of the Zürich S-Bahn that provides rush-hour service between and , in the Swiss canton of Zürich. Swiss Federal Railways operates the service. History. The S20 was introduced on 11 June 2019, with the initial southeastern terminus at . It was extended from Stäfa to with the December 2021 timetable change. Operations. there are four departures in the morning from Uerikon and three in the late afternoon/early evening from . The service does not operate on weekends. Most services are operated by SBB-CFF-FFS Re 420 locomotives pulling coaches. S20 (ZVV