Line DM9: Brétigny-sur-Orge <> station Leuville-sur-Orge <> Longpont-sur-Orge <> Saint-Michel-sur-Orge station
Line DM13: Brétigny-sur-Orge <> Leuville-sur-Orge <> Linas UNM / UTAC station
- DM9: An increased frequency and an extended route to Brétigny-sur-Orge station in connection with the RER C.
- A reinforced service between Château d'Eau (Linas), Leuville-sur-Orge and Brétigny-sur-Orge thanks to a part of the common route between lines DM9 and DM13. The "Aristide Briand" and "Bois Badeau" stops remain only served by the DM13, as they are today.
- Reinforced connections at the "Château d'eau" stop with lines M151, M153, M154 and 91-05 to reach Paris, Massy-Palaiseau or Evry.
- DM9 line: Buses from 6:30 am to 7:30 pm every 30 minutes, in the morning and evening, from Monday to Friday.
- DM13 line: Buses from 6 am to 9:30 pm every 15 to 30 minutes, in the morning and evening, from Monday to Friday.
TàD 1 and 5 take over during off-peak hours.