A tough period for users of the Île-de-France and Paris public transport. This summer, major works are underway on certain lines of the metro, RER, Transilien and tram to upgrade the networks. On the RER C, service is interrupted from July 15 to August 22 between Gare d'Austerlitz and Versailles Château Rive Gauche / Saint-Quentin-en-Yvelines and Pontoise.
RER C: closure between Austerlitz and western Paris for major works in 2026
The RER C will be completely suspended between Austerlitz station and western Paris due to a large-scale safety and modernization project. The closure will last for 39 days, from July 15 to August 22, 2026, with a major impact on summer travel. [Read more]
But these summer works on the RER C line are not the only disruptions to daily life for passengers. This Saturday, July 25, 2026, travelers will also have to adapt because of an bomb disposal operation in Val-de-Marne. Following the discovery of an air-dropped World War II bomb in the Choisy-le-Roi area, a major security perimeter will be established this Saturday, triggering the evacuation of residents as well as disruptions to public transport.
Following the discovery of a World War II-era aerial bomb, a bomb disposal operation is planned for this Saturday, July 25, 2026, in Val-de-Marne. The department prefect has announced a large security perimeter and the precautionary evacuation of some residents. So, could you be affected? and what are the recommendations? Here’s everything you need to know. [Read more]
"For security reasons and at the request of law enforcement", the RER C traffic is therefore interrupted this Saturday from about 9:30 a.m. to 3:15 p.m., between Vitry-sur-Seine and Pont de Rungis and then between Vitry-sur-Seine and Juvisy. As for the Choisy-le-Roi station, it will not be served from 8 a.m. As for the stations Les Ardoines, Les Saules, Villeneuve-le-Roi, Ablon and Athis-Mons, they will be served by regular buses, but with "a risk of heavy congestion", notes Transilien SNCF.
Meanwhile, the Prefect of Val-de-Marne says that the tram line T9 will run only between Porte de Choisy and the Verdun-Hoche stop, which will be its temporary terminus until the end of operations. Finally, bus lines 182, 183, 185 will cease operating from 8:30 a.m.
Also, in light of the major disruptions scheduled for July 25 on the RER C, passengers are urged to postpone their travel as much as possible.
Official website
www.transilien.com
RER C: closure between Austerlitz and western Paris for major works in 2026
Bomb disposal operation in Val-de-Marne this Saturday: are you in the evacuation zone?
