Bad news for travelers in the Essonne (91) : four stations on the RER C are no longer served toward Juvisy this Monday, September 14, 2026. Saint-Michel-sur-Orge, Sainte-Geneviève-des-Bois, Épinay-sur-Orge and Savigny-sur-Orge are affected since mid-afternoon, due to a breakdown in the Savigny-sur-Orge area.
The disruption isn’t minor on this southern branch of the line, which is heavily used during peak hours. It’s expected to last until 8 p.m., according to the latest word from the operator.
The cause of the problem is now known: a fault in the traffic signals was detected on lane 2B, near Savigny-sur-Orge. It took several investigations by the technical teams to pinpoint the source.
Repairs are needed to bring the installations back to full operation, Transilien SNCF said on the X feed for Line C. The intervention is expected to last until 8 p.m., with no guarantee that service will be back to normal sooner.
Trains traveling from Brétigny to Juvisy take a substitute route that does not stop at the stations in the Vallée de l’Orge. Four of them will therefore be without service in this direction:
The solution proposed by the operator requires a bit of patience, but it works. If you need to alight at one of these four stations, stay on board until Juvisy, then catch a train in the opposite direction.
Two services let you head back toward the Vallée de l'Orge: the DEBA trains toward Dourdan, and the ELBA trains toward Saint-Martin d'Étampes. Expect longer travel times, especially since Juvisy remains one of the busiest hubs in the Île-de-France network, with its connection to the RER D.
To monitor real-time developments, the easiest option is to check the SNCF Connect traffic info, the Île-de-France Mobilités app, or the line’s own X account, updated as interventions unfold. Regular users in the area can also turn to the association CIRCULE, which closely tracks life on Line C in Essonne.
Some relief for travelers in Épinay-sur-Orge: Tram T12 now provides an extra outlet, linking Massy-Palaiseau to Évry-Courcouronnes and letting passengers bypass part of the disrupted area.
