Usually, it's a season eagerly awaited by many. But it's also dreaded by others. Summer may be synonymous with vacations for some, but it's also a time of stress for many Parisian public transport users. During the off-peak period, work on several metro and RER lines is stepped up, inevitably causing traffic disruption. Such is the case on metro line 9. As announced by RATP,"improvements to the train control system on metro line 9" will result in the complete closure of the line from 10.45pm on Monday August 4 to Friday August 8, 2025 inclusive.
Other worksites will also impact train traffic, such as on RER line C. For many years now, this has unfortunately become a habit for users of this RER line. Every summer, maintenance and modernization work causes long interruptions to traffic. As revealed by our colleagues in Le Parisien and France 3 Paris Île-de-France, work is about to resume on RER line C, which will have to cope with major disruptions this summer.
So, what can we expect? Traffic on RER line C will be disrupted for 6 consecutive weeks, as in 2023. Work will start on July 12 and finish on August 23, 2025. But which sections will be affected? Trains will not be running between Gare d'Austerlitz and Avenue Henri-Martin, then between Versailles Château Rive Gauche and Saint-Quentin en Yvelines.
Trains will also be at a standstill between Avenue Henri-Martin and Pontoise on July 26, and from August 1 to 23, 2025. It's going to be another tough summer for RER C users.
RER C: disrupted or interrupted traffic, real-time news on the public transport line
Technical or passenger incidents, disrupted or interrupted traffic, roadworks or closed stations: we're sharing real-time traffic news with you on the RER C line in Île-de-France. [Read more]
