After metro lines 3, 4, 8, and 12, as well as the RER A and RER C, the RER B won’t escape the construction projects planned by the RATP. As you probably know, the RATP is undertaking numerous construction projects to modernize its lines… And constructioninevitablymeansservice disruptions (and headaches) for the many commuters affected… Here arethe dates to keep in mind to make your future trips easier!
The RER B: a very disrupted May…
Did you think the construction was over? That was without counting on the RER B, which is set to undergo a series of construction projects of its own. For the month of May, service will be suspended from Monday, May 5, 2026, to Thursday, May 28, 2026, starting at 10:45 p.m. (except on May 8, 14, 15, and 25, 2026) between Châtelet-Les Halles and Charles de Gaulle Airport 2 – TGV/Mitry-Claye.
As if that weren’t enough, service will be suspended right during a long weekend in May! If you were planning to travel between Gare du Nord and Charles de Gaulle 2-TGV/Mitry-Claye from May 8 to 10, you can forget it. No trains will run on this section all day. The same goes for the Ascension Day long weekend, from May 23 to 25.
Also, be aware that at the end of May, you won’t be able to take the RER between Gare du Nord and Denfert-Rochereau from 10:45 PM on June 5 through June 7.
An RER line almost entirely suspended throughout the summer
If you won’t be able to take a train between Denfert-Rochereau and La Croix de Berny / Robinson on June 27 and 28, be aware that July and August will be particularly difficult for getting around.
No RER trains will run between Gare du Nord and Bourg-la-Reine from July 25 to August 6, all day long. That’s 13 consecutive days. But that’s not all! From August 7 to 16, the same disruption will occur between Gare du Nord and La Croix de Berny / Robinson.
The RATP encourages its users to keep these dates in mind before planning their trips. Plan your trips well in advance, take other public transportation if possible, or work from home… In short, the coming days are likely to be a headache for many residents of the Paris region! Good luck!
