RER C works: dates, times and alternatives for August 2026 Last updated: August 4, 2026
In August 2026, the RER C line will be closed on certain dates and on several sections. These closures have a direct impact on your travel: find the schedule and our advice in this article.
Key dates
Disruptions are scheduled on the RER line 
to modernize infrastructure, strengthen safety, and improve passenger comfort.
🚫 Disruption Paris Austerlitz <> Saint-Martin d'Étampes (evenings)
Sundays August 2, 9 and 16
From Monday August 3 to Friday August 21 (except Saturdays, Sundays and public holidays)
Sundays August 23 and 30
From Monday August 24 to Friday September 4 (except Saturdays and Sundays)
Alternative route: replacement buses serving intermediate stations
🚫 Disruption Paris Austerlitz <> Massy-Palaiseau (evenings)
From Monday August 24 to Friday September 18 (except Saturdays and Sundays)
Alternative route: metro lines 7 or 14, tram lines T3a, T7, T9, city buses 180, 182, 183, 323, 325, 482, 483 or TVM
🚫 Disruption Paris Austerlitz <> Dourdan (evenings)
Sundays August 2, 9 and 16
From Monday August 3 to Friday August 21 (except Saturdays, Sundays and public holidays)
Sundays August 23 and 30
From Monday August 24 to Friday September 4 (except Saturdays and Sundays)
Alternative route: replacement buses serving intermediate stations
🚫 Disruption Paris Austerlitz <> Juvisy (evenings)
From Monday August 3 to Friday August 21 (except Saturdays, Sundays and public holidays)
From Monday August 24 to Friday September 4 (except Saturdays and Sundays)
Alternative route: replacement buses serving intermediate stations
🚫 Disruption Paris Austerlitz <> Pont de Rungis (evenings)
From Monday August 3 to Friday August 21 (except Saturdays, Sundays and public holidays)
From Monday August 24 to Friday September 4 (except Saturdays and Sundays)
Alternative route: metro, tramways and city buses
🚫 Disruption Paris Austerlitz <> St-Quentin en Yvelines / Versailles-Château (all day)
From Wednesday July 15 to Saturday August 22
Alternative route: RER or train, metro, tramways or existing city bus lines
🚫 Disruption Paris Austerlitz <> Pontoise (all day)
From Wednesday July 15 to Saturday August 22
Alternative route: RER or train, metro, tramways or existing city bus lines
🚫 Orly Ville station not served by trains toward Paris
From Monday July 6 to Sunday August 30
Alternative route: existing city buses
Adapt your journeys with the Bonjour RATP app
🔎 Search for the best route
Start a route search: the results anticipate disruptions to help you avoid construction areas. Then customize according to your needs: schedules, modes of transport, lines or stations to avoid…
🚦 Check live traffic information
Access real-time traffic status via the app's Traffic tab. You can enable personalized alerts to be notified when your lines are affected.
📹 Demo: follow traffic updates with the app
The Bonjour RATP app, your ally for anticipating disruptions and
finding the best routes during construction work
