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: Paris Nord - Aulnay, 08 and 09/03 :
Period: all day
Dates: weekend of March 08 and 09, 2025
Traffic will be interrupted between Paris Gare du Nord and Aulnay-sous-Bois.
A replacement bus service will be provided, serving intermediate stations.
If possible, we invite you to postpone your journey or to allow for a longer journey time.
For more information, visit the RER B blog.
Reason : works
- Line B: interconnection suspended from 14 to 17/02 :
Period: all day
Dates: Friday February 14 to Monday February 17, 2025 (inclusive)
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 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 more information, visit the RER B blog.
Reason : works
- Line B: Le Bourget - Aulnay-ss-Bois, 25-26/01 :
Period: all day
Dates: weekend of January 25 and 26, 2025
Traffic will be interrupted between Le Bourget and Aulnay-sous-Bois. We invite you to postpone your journey if possible, or to allow for a longer journey time.
For more information, visit the RER B blog.
Reason: construction work
- Line B: Le Bourget-Aulnay-ss-Bois, 11-12/01 :
Period: all day
Dates: weekend of January 11 and 12, 2025
Traffic will be interrupted between Le Bourget and Aulnay-sous-Bois.
We invite you to postpone your journey if possible, or to allow for a longer journey time.
For more information, visit the RER B blog.
Reason : works
- Line B: traffic interrupted from 28 to 30/04 :
Period: Monday to Friday, from 10:45pmDates: April 28, 29 and 30, 2025
Traffic is 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 blog.
Reason: construction work
- 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.
If possible, we invite you to postpone your journey or to allow for a longer journey time.
For more information, visit the RER B blog.
Reason: construction work - Line B: Aulnay - CDG2 Airport, 03/29 :
Period: all day
Date: March 29, 2025
Traffic is interrupted between Aulnay-sous-Bois and Aéroport CDG2-TGV.
A replacement bus service will be provided to intermediate stations.
If possible, we invite you to postpone your journey or allow for a longer journey time.
For further information, visit the RER B blog.
Reason : works
- Line B: Denfert - Croix de B./Robinson, 22-23/03 :
Period: all day
Date: weekend of March 22 and 23, 2025
Traffic is interrupted between Denfert-Rochereau and La Croix de Berny / Robinson.
If possible, please postpone your journey or allow for an extension of your journey time.
For more information, visit the RER B blog.
Reason : works
- 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.
We invite you to postpone your journey wherever possible, or to allow for a longer journey time.
For more information, visit the RER B blog.
Reason: construction work
- 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 more information, visit the RER B blog.
Reason : works
- 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, 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 more information, visit the RER B blog.
Reason : works
- Line B: interconnection suspended 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 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, 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 more information, visit the RER B blog.
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 2024
Traffic is interrupted between La Croix de Berny and Le Guichet.
For more information, visit the RER B blog.
Reason : works
- Line B: Paris Nord-CDG2/Mitry from 06/01 to 21/03 :
Period: Monday to Friday, from 10:45pmDates: 06/01 to 21/03/2025, except on 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.
For more information, visit the RER B blog.
Reason : works
- Line B: Châtelet - CDG2/Mitry from 24/03 to 25/04 :
Period: Monday to Friday, from 10.45pm
Dates: March 24 to April 25, 2025, except April 18 and 21, 2025.
Traffic is interrupted between Châtelet-les-Halles and Aéroport CDG2-TGV / MItry-Claye.
A replacement bus service will be provided, serving intermediate stations.
For more information, visit the RER B blog.
Reason : works
- Line B: Denfert-CDG2/Mitry, 05-28/05, except 08 :
Period: Monday to Friday, from 10:45pm
Dates: May 05 to 28, except May 08
Traffic will be interrupted between Denfert-Rochereau and Aéroport CDG2-TGV / Mitry-Claye, with a replacement bus service to intermediate stations.
For more information, visit the RER B blog. Reason : works
- Line B. Timetable changes from 23/12 to 05/01:
During the school vacations from 23/12 to 5/01, your timetables will change on your line. To prepare your journey and before going to the station, check your timetable on the Ile-de-France Mobilités app, the Transilien.com website, Bonjour RATP, SNCF Connect or your Mobilités app.
