RER B : works and closures

Starting in January 2025, construction work will resume on the RER B line to ensure maintenance, modernization, and preparation for the arrival of future trains. Below, you’ll find details about the upcoming closures and service interruptions scheduled between January and May 2025.

Between Gare du Nord and Aéroport Charles de Gaulle 2-TGV / Mitry-Claye

From Monday, January 6, to Wednesday, April 30, 2025, RER B service will be interrupted in both directions Monday to Friday, from 10:45 PM until the end of service. Service will resume as usual each following morning.

Exceptions: No evening interruptions on January 31, February 14, 17, 21, and 24.

Between Châtelet–Les Halles and Aéroport Charles de Gaulle 2-TGV / Mitry-Claye

From Monday, March 24, to Friday, April 25, 2025, RER B service will be interrupted in both directions Monday to Friday, from 10:45 PM until the end of service. Service will resume as usual each following morning.

Exceptions: No evening interruptions on April 18 and 21.

Between Denfert-Rochereau and Aéroport Charles de Gaulle 2-TGV / Mitry-Claye

From Monday, May 5, to Wednesday, May 28, 2025, RER B service will be interrupted in both directions Monday to Friday, from 10:45 PM until the end of service. Service will resume as usual each following morning.

Exception: No evening interruption on May 8, 2025.

Between La Croix de Berny and Le Guichet

On Friday, February 28, and Saturday, March 1, 2025, RER B service will be interrupted in both directions from 11 PM until the end of service. Train service will resume as usual on Sunday, March 2, 2025.

Between Le Bourget and Aulnay-sous-Bois

On the weekends of January 11–12, January 25–26, and on Sunday, February 9, 2025, RER B service will be interrupted in both directions all day and into the evening until the end of service.

Service will resume as usual on the following Mondays.

Between Gare du Nord and Aulnay-sous-Bois

On the weekend of March 8–9, 2025, RER B service will be interrupted in both directions all day and into the evening until the end of service.

Service will resume as usual on Monday, March 10, 2025.

Between Aulnay-sous-Bois and Aéroport Charles de Gaulle 2-TGV

On Saturday, March 29, 2025, from April 19 to 21, and on May 3 and 4, 2025, traffic will be interrupted in both directions all day and in the evening until the end of service. It will resume as usual the day after these works.

Attention! During the weekend interruptions in March and April, additional works will be carried out, requiring a disruption of the interconnection at Gare du Nord. These works are mentioned further down in the article.

Between Denfert-Rochereau and La Croix de Berny/ Robinson

On the weekend of March 22 and 23, 2025, traffic will be interrupted in both directions all day and in the evening until the end of service. It will resume as normal on Monday, March 24, 2025.

From Friday, February 14 to Monday, February 17, from Friday, February 21 to Monday, February 24, from Saturday, March 29 to Sunday, March 30, 2025, and from Saturday, April 19 to Monday, April 21, 2025, works will cause an interruption of the RER B interconnection at Gare du Nord.

A train change will be necessary to continue your journey, both from the underground and above-ground stations. The transport service will be significantly reduced due to this interconnection disruption. Fewer trains will be running on the line.

We strongly recommend postponing your trip and planning your travel in advance, especially during the weekdays of the mentioned periods.

To the north of the line, maintenance and modernization work on the infrastructure continues in the evening. During the period when the Paris section will be closed in the evening, teams will also continue the construction of the Saint-Michel–Notre-Dame station. These are preparatory works for the renovation of the station, addressing water infiltration issues, and modernizing the drainage system.

For the weekend and extended weekend works, different modernization programs will be carried out:

• Between Aulnay-sous-Bois and Le Bourget, new track equipment will be installed. These infrastructures provide additional solutions to maintain the line’s operation in the event of an incident.
• Between Gare du Nord and Aulnay-sous-Bois, alongside the works for the construction of the Charles de Gaulle Express, the RER B line will undergo a catenary regeneration program.
• Between Aulnay-sous-Bois and Charles de Gaulle 2 Airport, as part of the modernization phases, several station platforms will be upgraded to accommodate the future MI20 trains, which are larger than the MI79 and MI84 trains. Additionally, a new footbridge will be installed at Parc des Expositions station.
• To the south of the line, the renewal project for the Bourg-la-Reine signaling center will enter a new phase. This is the most important control center on the southern part of the line, managing switches for the sections between Denfert-Rochereau and La Croix de Berny/Robinson. The aim of these works is to improve the operational robustness of the line and prepare for the arrival of the NExTEO B&D system, which will work with the future MI20 trains.
• During the evening closure between La Croix de Berny and Le Guichet, a new rectifier station will be tested and commissioned to provide power to major installations located at Massy-Palaiseau, including the maintenance workshops and the new pit jack system, ready to accommodate the new MI20 trains.
• Finally, the works in the Paris Nord area, requiring the interconnection disruption at Gare du Nord, will impact several lines, including the RER B. This major project, managed by SNCF Réseau, involves the replacement of a 130-year-old bridge. The interconnection disruption periods from January to May correspond to the new phase of assembly of the "Cathedrals Bridge."

• Consult the account X @RERB, and the RER B blog.
• To plan your travel in advance and see your journey time, please consult the itinerary planner.
• Consult the line   map.
• Consult the list of others stations with works and closures in progress.

This page is regularly updated to reflect works and closures on the line.