[4] At Zürich HB, trains of the S11 service usually depart from underground tracks (Gleis) 41–44 (Museumstrasse station).

[4][5][6] As of the December 2022 timetable change,[update] all services are operated with RABe 511 class trains.

Refurbished Re 420 (LION) locomotives push-pulling double-decker coaches were used at that time.

[10] Prior to the December 2023 timetable change, off-peak S11 trains ran only hourly between Dietikon and Aarau because of capacity constraints on the Heitersberg railway line.

Improvements to that line permitted regular half-hourly service over that part of the route.