RER B: traffic disrupted or interrupted, real-time information on the line

Linking the north and south of theParis region over an 80-kilometer route, the RER B opened in 1977 and today serves 47 stops, connecting residential and business areas across various départements. To the north, it departs fromCharles de Gaulle airport and Mitry-Claye in Seine-et-Marne, passing through Seine-Saint-Denis with key stops such as Aulnay-sous-Bois. Heading south, it reaches Saint-Rémy-lès-Chevreuse in the Yvelines to take us to the sublime Vallée de Chevreuse, crossing theEssonne with stops including Orsay and Bures-sur-Yvette.

In Paris, the RER B crosses several central arrondissements, offering direct access to points of interest such as the Latin Quarter and Jardin du Luxembourg in the 5th arrondissement, and the famous Parc Montsouris in the 14th. It also connects with the Stade de France in Saint-Denis, and the Villepinte exhibition center. The line also offers multiple connections with other RER lines(A, C, D, E) and several metro lines(4, 6, 10, 14).

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If you're a regular user of this line in the RATP-SNCF network, here's where we share real-time information on traffic on the RER B public transport network in the Paris region. Whether it's work in progress, station closures, strikes orunforeseen incidents, we'll give you the lowdown on current and future disruptions on the RER B in Paris and the Ile-de-France region.

• RER B : Châtelet <-> CDG2 Airport - Mitry - Claye 01/06-31/12 :
  Period: weekdays from 10:45 p.m.
  Dates: Monday, June 1 to Thursday, December 31
  Traffic is suspended between Châtelet–Les Halles and Aéroport CDG 2 and between Châtelet–Les Halles and Mitry–Claye.
  A replacement bus service will be deployed starting from Gare du Nord.
  For more information, please visit the RER B website.
  Reason: railway works.
• Grands Travaux d’été : du 25 juillet au 6 août : -> Major Summer Projects: July 25 to August 6:
  Period: all day Dates: from July 25 to August 6
  - Gare du Nord <> Bourg-la-Reine: Traffic disrupted
  - Gare du Nord <> CDG 2 Airport / Mitry-Claye: reduced transport service (plan for about 1 train every 7 minutes)
  Recommended routes:
  - For Châtelet-les-Halles: RER E to Saint-Lazare, then Metro 14 to Châtelet-les-Halles
  - For Paris Gare de Lyon: RER E to Saint-Lazare, then Metro 14 to Paris Gare de Lyon
  - For Bourg-la-Reine: Metro 4 to Porte d’Orléans (replacement bus departures)
  Durant toute la période
  - Expect high crowding at Gare du Nord
  - At Gare du Nord: trains arriving and departing on the Grandes Lignes tracks
  We invite you, as far as possible, to postpone your travel.
  For more information on these works, consult the RER B blog.
  Reason: Works on the railway network (replacement of 26 turnouts in the Gare du Nord area)
• Big Summer Projects: from July 25 to August 6:
  Period: all day Dates: July 25 to August 6
  - Gare du Nord <> Bourg-la-Reine: Service disruption
  - Gare du Nord <> CDG Airport 2 / Mitry-Claye: reduced service (expect roughly 1 train every 7 minutes) Recommended routes:
  - For Châtelet-les-Halles: RER E to Saint-Lazare, then Metro 14 to Châtelet-les-Halles
  - For Paris Gare de Lyon: RER E to Saint-Lazare, then Metro 14 to Paris Gare de Lyon
  - For Bourg-la-Reine: Metro 4 to Porte d'Orléans (replacement buses operate from there) Throughout the period
  - Expect very high crowding at Gare du Nord
  - At Gare du Nord: trains arriving and departing on the Grandes Lignes tracks We invite you, as far as possible, to postpone your travel.
  For more information on these works, consult the RER B blog.
  Reason: Rail work (replacement of 26 switches in the Gare du Nord area)
• Major Summer Works: August 7–16:
  Period: all day Dates: from August 7 to 16
  - Gare du Nord <> La Croix-de-Berny / Robinson: service suspended
  - Gare du Nord <> CDG 2 / Mitry-Claye: reduced service (expect about one train every 7 minutes on average)
  Recommended routes from Gare du Nord:
  - To Châtelet-les-Halles: RER E to Saint-Lazare, then Metro 14 to Châtelet-les-Halles
  - To Paris Gare de Lyon: RER E to Saint-Lazare, then Metro 14 to Paris Gare de Lyon
  - To La Croix-de-Berny or Robinson: Metro 4 to Porte d’Orléans (replacement buses on standby)
  Throughout the period:
  - High crowding expected at Gare du Nord
  - At Gare du Nord: trains arriving on and departing from the Long-Distance tracks
  We ask you, as far as possible, to postpone your travel.
  For more information on these works, see the RER B blog.
  Reason: Rail network works (replacement of 26 switches in the Gare du Nord area)

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