The R3 operates every hour between Vallorbe and Aigle, using the western end of the Simplon line.

The R3 is paired with the R4 between Le Day and Aigle, providing half-hourly service.

It ran hourly between Allaman and Villeneuve VD, on the Simplon line.

[5] With the December 2020 timetable change, the S3 was cut back to Lausanne, with the S5 taking over the Lausanne–Villeneuve service.

[6] The RER Vaud lines were substantially reorganized for the December 2022 timetable change.