As per reports, significant disruptions to SNCF and RATP services in Paris and Île-de-France are expected due to modernization and maintenance works from Monday (06 January) until Sunday (12 January). Key metro, RER, tramway, and Transilien lines will experience interruptions during specific timeframes.

• On Monday (06 January) and Tuesday (07 January), Metro Line Six will cease operations between Charles-de-Gaulle Étoile and Nation from 2200 hours (local time). Line 14 will be non-operational between Maison-Blanche and Saint-Denis–Pleyel from 2200 hours (local time), with replacement buses available between Gare de Lyon and Olympiades.
• From Monday (06 January) to Friday (10 January), RER A service will be interrupted between Maisons-Laffitte and Poissy starting at 2215 hours (local time), with replacement buses provided. From Saturday (11 January) until Sunday (12 January), RER B trains will not operate between Le Bourget and Aulnay-sous-Bois, and from Monday (06 January) to Sunday (12 January), service between Charles-de-Gaulle Airport Terminal 2 – TGV and Gare du Nord will be suspended from 2245 hours (local time), with replacement buses in place. On RER C, from Monday (06 January) to Sunday (12 January), no trains will run from Paris Austerlitz to Dourdan/Saint-Martin d’Étampes after 2330 hours (local time), and between Austerlitz and Juvisy after 2300 hours (local time). Additional sections impacted include Paris Austerlitz to Pont de Rungis, Versailles Château Rive Gauche to Javel, and Javel to Saint-Quentin-en-Yvelines, with similar nighttime suspensions; replacement buses will be available.
• On RER D, until 07 February, traffic will be interrupted from Gare de Lyon to Melun/Corbeil-Essonnes from 2315 hours (local time) From Monday (06 January) to Saturday (11 January), services will end earlier between Villeneuve-Saint-Georges and Melun/Creil, with replacement buses provided. For RER E, nightly service will halt from 2225 hours (local time) between Nanterre-La-Folie and Villiers-sur-Marne–Le Plessis-Trévise and Tournan until 12 February, while weekend disruptions will continue until 26 January.
• Tramway T1 operations remain suspended between Noisy-le-Sec station and Escadrille Normandie-Niémen until 31 March, with buses replacing tram services. On Tramway T4, from Monday (06 January) to 22 February, services will be suspended between Aulnay-sous-Bois and Bondy on select evenings. For Tramway T13, night service will be suspended from Monday (06 January) to 31 January starting at 2100 hours (local time).
• On Transilien Line L, from Monday (06 January) to 17 January, nightly disruptions between Saint-Cloud and Saint-Nom-la-Bretèche will begin at 2110 hours (local time). For Line N, nightly service disruptions between Mantes-la-Jolie and Montparnasse and between Rambouillet and Montparnasse will occur throughout January. Line P will experience service interruptions affecting Gare de l’Est to Provins, Meaux, and Coulommiers during nighttime hours through 31 January, with additional weekend disruptions impacting Meaux to Gare de l’Est and Château-Thierry to Gare de l’Est from Saturday (11 January) to 26 January. On Line R, service interruptions from Melun to Montereau will occur from Monday (06 January) to Friday (10 January) after 2345 hours (local time), with buses replacing trains.