Public transport in Paris and Île-de-France: metro and RER disruptions from August 17 to 23, 2026.

This week from Monday, August 17 to Sunday, August 23, 2026 brings welcome news for the public transport network in Paris and Île-de-France: the RER B is back in service between Gare du Nord and Croix-de-Berny-Robinson after the replacement of 40 switches. The SNCF and the RATP are nonetheless pushing ahead with their final major summer works before the return to routine. The RER B is not yet fully restored and remains cut in the evening toward the airport. The RER A is interrupted between Vincennes and Noisy-le-Grand-Mont d’Est. The Line 13 of the metro resumes normal service this Monday. The Line J of the Transilien launches a long project through September 4. From metro to RER, including Transilien and tram, here’s a rundown of what to expect.

RER B: Is service really resuming this week?

Good news for commuters: the RER B is back in service from Gare du Nord to Croix-de-Berny-Robinson after the unprecedented overhaul to replace 40 underground switches. That said, service isn’t fully back to normal yet. From Monday the 17th to Friday the 21st of August, inclusive, weekday evenings starting at 10:45 PM, traffic will be suspended between Denfert-Rochereau and Mitry-Claye/Charles de Gaulle 2-TGV due to ongoing works. If you’re flying in the evening, plan a fallback route this week.

Which metro lines are disrupted this week?

In the Parisian metro, three lines are affected:

• Line 8: Reminder: République station is not served due to renovation works through 22 April 2027, inclusive. A long-term closure to note.
• Line 12: From Wednesday the 19th to Sunday the 30th of August, inclusive, on Wednesdays and Sundays from 10 p.m., service will be suspended along the entire line for modernization works.
• Line 13: Until Monday the 17th of August, inclusive, service is interrupted between Saint-Denis Université and La Fourche due to modernization works. Replacement buses run between Saint-Denis Université and Mairie de Saint-Ouen. The line returns to normal service on Tuesday.

What disruptions to the RER services from August 17 to 23?

The RER lines are still facing numerous disruptions ahead of the back-to-school period:

• RER A: Through Sunday, August 23 inclusive, service is suspended between Vincennes and Noisy-le-Grand-Mont d'Est due to modernization work. The outage affects the eastern part of the line all week.
• RER B : Although partial service resumes between Gare du Nord and Croix-de-Berny-Robinson, not all routes are back to normal.
  • From Monday, August 17 to Friday, August 21 inclusive, weekdays after 10:45 p.m., service is suspended between Denfert-Rochereau and Mitry-Claye/Charles de Gaulle 2-TGV due to works.
• RER C : Through Friday, August 21 inclusive, weekdays after 11:00 p.m., service is interrupted on several sections.
  • Between Dourdan-la-Forêt and Brétigny due to works.
  • Between Pont de Rungis Aéroport d'Orly and Choisy-le-Roi due to works.
  • Between Gare d'Austerlitz and Juvisy due to works.
  • Between Gare d'Austerlitz and Saint-Martin-d'Étampes due to works.
• RER D : Maintenance works continue on weekdays and weekends with replacement buses.
  • Until Friday, August 21 inclusive, weekdays after 11 p.m., service is suspended between Gare de Lyon and Melun/Corbeil-Essonnes due to works. Replacement buses are in place.
  • Saturday, August 22 and Sunday, August 23 inclusive, service will be suspended between Creil and Goussainville due to works (replacement buses).
  • On Saturday, August 22, service will be cut between Gare de Lyon and Melun (replacement bus), and from 10 p.m. between Châtelet-Les Halles and Villeneuve-Saint-Georges (replacement buses).
  • Through Sunday, August 23 inclusive, weekends, service is suspended between Corbeil-Essonnes and Malesherbes due to works.
  • Until August 28 inclusive, Mondays to Fridays after 11:35 p.m., service is suspended between Creil and Gare du Nord due to works.
  • Until August 28 inclusive, Mondays to Fridays after 11:00 p.m., service is suspended between Corbeil-Essonnes and Malesherbes due to works.
• RER E : Long-running project continues through September.
  • Until Saturday, August 22 inclusive, Saturdays after 10:45 p.m., service is suspended between Chelles-Gournay and Nanterre-La Folie due to works (replacement buses).
  • Until Saturday, August 29 inclusive, Saturdays after 10:20 p.m., service is suspended between Tournan and Noisy-le-Sec due to works.
  • Until Thursday, September 4 inclusive, weekdays after 10:45 p.m., service is suspended between Nanterre-La Folie and Chelles-Gournay due to works (replacement buses).

Which Transilien lines are affected from August 17 to 23?

The Transilien network remains heavily congested, with line J launching a lengthy works programme that will run through the start of the new school year.

• Ligne H : jusqu’au vendredi 21 août inclus, du lundi au vendredi dès 22h30, le trafic est interrompu entre Sarcelles-Saint-Brice et Luzarches/Persan-Beaumont en raison de travaux. Bus de remplacement.
  
  
• Ligne J : à partir de ce lundi 17 août jusqu’au 4 septembre inclus, du lundi au vendredi de 21h40 à 3h, le trafic sera interrompu entre Gare Saint-Lazare et Mantes-la-Jolie, et entre Gare Saint-Lazare et Conflans-Sainte-Honorine en raison de travaux (bus de remplacement). Aux mêmes dates, de 22h40 à 3h, il le sera entre Gare Saint-Lazare et Conflans-Sainte-Honorine. À partir du vendredi 21 août jusqu’au 4 septembre inclus, du lundi au vendredi dès 21h45, la circulation est coupée entre Ermont-Eaubonne et Gare Saint-Lazare en raison de travaux (bus de remplacement). Les samedi 22 et dimanche 23 août inclus, le trafic sera interrompu entre Asnières-sur-Seine et Ermont-Eaubonne/Mantes Station via Conflans-Fin d’Oise en raison de travaux (bus de remplacement). Un gros chantier qui démarre lundi et dure jusqu’à la rentrée.
  
  
• Ligne K : jusqu’à ce lundi 17 août inclus, le trafic est interrompu entre Gare du Nord et Mitry-Claye en raison de travaux sur le réseau ferré. La ligne reprend son service normal dès mardi.
  
  
• Ligne L : de ce lundi 17 août au 11 septembre inclus, du lundi au vendredi de 22h45 à 3h, le trafic sera interrompu entre Bécon-les-Bruyères et Maisons-Laffitte en raison de travaux. Un chantier qui s’étend jusqu’à la mi-septembre.
  
  
• Ligne N : à partir de ce lundi 17 au vendredi 21 août inclus, dès 0h40, le trafic sera interrompu de Gare Montparnasse vers Versailles Chantiers en raison de travaux. Bus de replacement.
  
  
• Ligne P : jusqu’au 6 septembre inclus, les week-ends de 22h30 à 2h, le trafic est interrompu entre Gare de l'Est et Château-Thierry en raison de travaux (bus de remplacement). Jusqu’au dimanche 23 août inclus, le trafic est interrompu entre Gare de l'Est et Coulommiers en raison de travaux (bus de remplacement). Jusqu’au 28 août inclus, du lundi au jeudi de 21h à 2h30, le trafic est interrompu entre Gare de l'Est et Château-Thierry en raison de travaux. Jusqu’au 4 septembre inclus, du lundi au vendredi dès 20h10, le trafic est interrompu entre Gare de l'Est et Coulommiers en raison de travaux, et dès 21h45 entre Gare de l'Est et Provins en raison de travaux. Le dimanche 23 août à partir de 22h20, le trafic sera interrompu entre Gare de l'Est et Château-Thierry en raison de travaux (bus de remplacement). La ligne demeure la plus impactée du réseau.
  
  
• Ligne R : jusqu’au vendredi 21 août inclus, du lundi au vendredi dès 23h15, le trafic est interrompu entre Gare de Lyon et Montargis/Montereau via Moret-Veneux-les-Sablons en raison de travaux (bus de remplacement).

Which tram lines are disrupted this week?

The tramway network is experiencing several disruptions, notably on the T1 line:

• T1 : Traffic remains suspended between Asnières-Quatre Routes and Gare de Saint-Denis, with disruption spreading to the rest of the line due to vandalism at L'Île-Saint-Denis. Restart planned for late summer 2026. Replacement buses are in service between Asnières-Gennevilliers-Les Courtilles and Mairie de Villeneuve-la-Garenne. Until August 27 inclusive, service is also interrupted between Asnières-Quatre Routes and La Courneuve-8 Mai 1945 because of modernization works, with the Caméléon T1 service between Asnières-Quatre Routes and Mairie de Villeneuve, the regular bus line 254 between Mairie de Villeneuve and Gare de Saint-Denis, and the Caméléon T1 service between Gare de Saint-Denis and La Courneuve-8 Mai 1945. Until August 31 inclusive, service is interrupted between Gare de Noisy-le-Sec and Bobigny-Pablo Picasso due to modernization works (replacement bus). A particularly troublesome line this summer.
• T2 : until Sunday, August 23 inclusive, service is interrupted between Charlebourg and Puteaux due to works (replacement buses in operation).
• T4 : from Tuesday, August 18 to October 21 inclusive, every Tuesday from 21:15 to 05:00, service will be interrupted along the entire line due to works (replacement buses).

How to plan ahead for your travel this week?

During the week of August 17–23, 2026, the summer “grands travaux” conclude as we head into the back-to-school period. Good news: the RER B resumes service between Gare du Nord and Croix-de-Berny-Robinson, even though the line remains cut in the evenings to the airport through August 21. The RER A is disrupted between Vincennes and Noisy-le-Grand-Mont d'Est all week. The Transilien Line J launches a major works project that lasts until September 4, with a replacement bus service. The Line 13 of the metro and the Line K switch back to normal service starting Tuesday. Plan for longer travel times and routinely check the real-time updates on Bonjour RATP and SNCF Connect for live traffic information. If you’ve got weekend plans, make your schedule allowances well in advance with things to do this weekend.

In short, the week of August 17–23, 2026 signals a return to normal ahead of the rentrée. The RER B resumes service in part after the track-switch work, but remains closed at night toward the airport. The RER A is interrupted between Vincennes and Noisy-le-Grand. The Line J launches into a lengthy works program that runs until September 4. The Line L will be cut in the evenings until September 11. The Line 13 and the Line K return to normal service starting Tuesday. The tramway T1 stays heavily disrupted with several works and replacement buses. If you’re traveling late at night, consider the Noctilien night-bus network, which runs all night. Have a good end to the summer!

• To be read
• This week's top picks for August 17–23, 2026 in Paris and Île-de-France

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