What's the current traffic situation on the RER B? Here's real-time information on current and future disruptions on this public transport line in the RATP-SNCF network.
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).
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.
- Line B: interconnection suspended on 29 and 30/03 :
Period: all day
Dates: weekend of March 29 and 30, 2025
Interconnection will be suspended at Paris Nord. To continue your journey, you will need to change trains between underground and surface tracks.
Trains to CDG2 airport and Mitry-Claye will depart from surface tracks 32 and 33. Trains to Robinson and Saint-Rémy-lès-Chevreuse will depart from the underground tracks, track 44.
As a result, we expect to see a reduction in the transport schedule and a risk of heavy traffic in stations and on board trains. We invite you, wherever possible, to postpone your journey or allow for a longer journey time.
For further information, please visit the RER B website.
Reason: roadworks
- Line B: Le Bourget and Aulnay-sous-Bois on 09/02 :
Period: all day
Dates: Sunday, February 09, 2025Traffic will be interrupted between Le Bourget and Aulnay-sous-Bois.
A replacement bus service will be set up, serving intermediate stations.
For further information, visit the RER B website.
Reason: work.
- Line B: traffic interrupted from 28 to 30/04 :
Period: Monday to Friday, from 10:45pmDates: April 28, 29 and 30, 2025
Traffic will be interrupted between Paris Gare du Nord and Aéroport CDG2 / Mitry-Claye.
A replacement bus service will be provided to intermediate stations.
For more information, visit the RER B website.
Reason: works
- Line B: Interconnection disruption from 14 to 17/02 :
Period: all day
Dates: Friday February 14 to Monday February 17, 2025 (inclusive)
The interconnection will be suspended at Gare du Nord. To continue your journey, you will need to change trains at Gare du Nord between the underground and surface tracks.
Trains to CDG2 Airport and Mitry-Claye will depart from surface tracks 32 and 33. Trains to Robinson and Saint-Rémy-lès-Chevreuse will depart from the underground tracks, track 44. As a result, we expect to see a reduction in the transport schedule and a risk of heavy traffic in stations and on board trains. We invite you, wherever possible, to postpone your journey or to allow for a longer journey time.
For further information, visit the RER B website.
Reason : works
- Line B: interconnection suspended from 21 to 24/02 :
Period: all day
Dates: from Friday February 21 to Monday February 24, 2025 inclusive.
Interconnection will be suspended at Paris Nord. To continue your journey, you will need to change trains between underground and surface tracks.
Trains to CDG2 Airport and Mitry-Claye will depart from the surface tracks, tracks 32 and 33. Trains to Robinson and Saint-Rémy-lès-Chevreuse will depart from the underground tracks, track 44.
As a result, a lighter transport schedule and the risk of crowded stations and trains are to be expected. We invite you, wherever possible, to postpone your journey or to allow for a longer journey time.
For further information, visit the RER B website.
Reason : works
- Line B: Aulnay - CDG2 Airport, from 19 to 21/04 :
Period: all day
Dates: from Saturday April 19 to Monday April 21, 2025 inclusive
Traffic is interrupted between Aulnay-sous-Bois and Aéroport CDG2-TGV.
A replacement bus service will be provided to intermediate stations.
For further information, visit the RER B website.
Reason : works
- Line B: Interconnection failure from 19 to 21/04 :
Period: all day
Dates: the weekend of April 19-20 and Monday April 21, 2025
The interconnection will be suspended at Paris Nord. To continue your journey, you will need to change trains between underground and surface tracks.
Trains to CDG2 airport and Mitry-Claye will leave from the surface tracks, tracks 32 and 33. Trains to Robinson and Saint-Rémy-lès-Chevreuse will depart from the underground tracks, track 44. As a result, we expect to see a reduction in the transport schedule and a risk of heavy traffic in stations and on board trains. Wherever possible, we invite you to postpone your journey or to allow for a longer journey time.
For further information, visit the RER B website.
Reason : works.
- Line B: Châtelet - CDG2/Mitry from 24/03 to 25/04 :
Period: Monday to Friday, from 10:45pmDates: March 24 to April 25, 2025, except April 18 and 21, 2025
Traffic will be interrupted between Châtelet-les-Halles and Aéroport CDG2-TGV / Mitry-Claye.
A replacement bus service will be provided, serving intermediate stations.
For further information, visit the RER B website.
Reason : works
- Line B: Denfert - Croix de B./Robinson, 22-23/03 :
Period: all day
Date: weekend of March 22 and 23, 2025Traffic is interrupted between Denfert-Rochereau and La Croix de Berny / Robinson.
For more information, visit the RER B website.
Reason: works
- Line B: Croix de Berny-Le Guichet, 28/02 and 01/03 :
Period: Friday to Saturday, from 23:00Dates: Friday 28 March and Saturday 01 April 2024Traffic is interrupted between La Croix de Berny and Le Guichet.
For more information, visit the RER B website.
Reason : works
- Line B: Paris Nord - Aulnay, 08 and 09/03 :
Period: all day
Dates: weekend of March 08 and 09, 2025Traffic is interrupted between Paris Gare du Nord and Aulnay-sous-Bois.
A replacement bus service will be provided to intermediate stations.
For further information, please visit the RER B website.
Reason : works
- Line B: Aulnay - CDG2 Airport, 03/29 :
Period: all day
Date: March 29, 2025Traffic is interrupted between Aulnay-sous-Bois and Aéroport CDG2-TGV. A replacement bus service will be provided to intermediate stations.
For more information, visit the RER B website.
Reason : works
- Line B: Aulnay - CDG2 Airport, May 03 and 04:
Period: all day
Dates: Saturday 03 and Sunday 04 May 2025
Traffic will be interrupted between Aulnay-sous-Bois and Aéroport CDG2-TGV. A replacement bus service will be provided to intermediate stations.
For more information, visit the RER B website.
Reason : works - Line B: Denfert-CDG2/Mitry-Claye, from 05 to 28/05 :
Period: Monday to Friday, from 10:45 pm
Dates: May 05 to 28, except May 08Traffic is interrupted between Denfert-Rochereau and Aéroport CDG2-TGV / Mitry-Claye. A replacement bus service is in place, serving intermediate stations. For further information, visit the RER B website.
- Line B: Paris Nord-CDG2/Mitry from 06/01 to 21/03 :
Period: Monday to Friday, from 10:45pmDates: January 06 to March 21, 2025, except January 31 / February 14, 17, 21 and 24, 2025
Traffic will be interrupted between Paris Gare du Nord and Aéroport Charles de Gaulle 2-TGV/ Mitry-Claye.
A replacement bus service will be provided, serving intermediate stations.
Please note: replacement buses serving stations between Aulnay-sous-Bois and Aéroport Charles de Gaulle 1 (line B4)/Mitry-Claye (line B3) will depart from Gare du Nord.
To reach stations between La Courneuve-Aubervilliers and Le Blanc-Mesnil (line B2), replacement buses will be provided at La Plaine-Stade de France. To reach La Plaine-Stade de France from Gare du Nord: take metro line 4 to Marcadet-Poissonniers, then metro line 12 to Porte de la Chapelle and bus 153.
For further information, visit the RER B website.
Reason : works
- Line B: Paris Nord-Aéroport CDG 2 Very busy :
Period: 8:30 a.m. to 7:30 p.m.
Date: February 10 to 13, 2025
Risk of large crowds in stations and on trains between Paris Gare du Nord and Aéroport Charles de Gaulle 2 (Terminal 2).
Reason: Paris Première Vision trade show
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