Initially, all services were operated by Re 450 class locomotives pushing or pulling double-deck passenger carriages. RABe 514 class multiple units began displacing the push-pull sets in 2008.[6] As of the December 2022 timetable change,[update] all services are operated with Re 450 locomotives and double-deck coaches.[7]
Scheduling
The train frequency is usually 30 minutes and the trip takes 70 minutes.[5]
History
Originally the S14 started in the terminal platforms at Zürich Hauptbahnhof, and ran via the Wipkingen Tunnel to Oerlikon and on to Hinwil. With the completion of the Altstetten–Zürich–Oerlikon cross-city line in 2015, it was diverted at Oerlikon to use the Weinberg Tunnel and the low-level through platforms of the Hauptbahnhof, before being extended to Affoltern am Albis to replace the S15 which was in turn diverted elsewhere. This diversion and extension means that the line no longer serves the railway stations of Wipkingen (on the original S14 route) and doesn't serve Hardbrücke (on the original S15 route).[8][4]