The R9 runs as an express between Lausanne and Palézieux, stopping only at Puidoux.

The R5 and R6 make local stops, combining with the R9 and the InterRegio 15 for service roughly every 15 fifteen minutes.

North of Palézieux, the R8 pairs with the R9 for half-hourly service to Payerne.

[3][4] RER Vaud introduced the S9 designation with the December 2015 timetable change, replacing the S21.

On 10 December 2023, all RER Vaud lines were renamed as "R" and a number, instead of "S."[5]