🚧 RER B closed: dates, sections and alternatives (summer 2026)

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    🚫 Closed today

    The RER B is not running between Gare du Nord ↔ Bourg-la-Reine. Works run 25 Jul 2026 – 6 Aug 2026.

    From 25 July to 16 August 2026, SNCF and RATP are closing the central section of the RER B under Paris for major track and signalling works. The CDG branch is also disrupted from 1 July to 31 August. This page explains exactly which sections are closed, on which dates, and how to get around it.

    Closure phases

    DatesSection closedHours
    25 Jul 2026 – 6 Aug 2026Gare du Nord ↔ Bourg-la-ReineAll day
    7 Aug 2026 – 16 Aug 2026Gare du Nord ↔ La Croix de Berny / RobinsonAll day
    1 Jul 2026 – 31 Aug 2026Mitry-Claye / CDG2 ↔ Châtelet–Les HallesAll day

    How to get around it

    Line 14 is free for the duration of the central closure (25 Jul – 16 Aug 2026) as a replacement for the RER B under Paris. Tap in and out without a ticket at any line 14 station.

    Métro line 4 is the second main reroute between Gare du Nord, Châtelet and Denfert-Rochereau.

    Going to CDG airport? Take Roissybus from Opéra, or Transilien K from Gare du Nord to Mitry-Claye. Allow at least an extra 45 minutes.

    See live CDG airport status →

    Is this a strike?

    No. These are planned modernisation works — ballast, track and signalling renewal, preparing the RER B for NExTEO (next-generation automatic train control). Nothing to do with a strike or a union action. Check live strike status →

    Frequently asked questions

    Check the box at the top of this page — it computes automatically from today's date whether the central RER B section is closed. Between 25 July and 16 August 2026 there is no service through Paris.

    SNCF and RATP are renewing ballast, track and signalling on the central tunnel, and preparing the line for NExTEO — the next-generation automatic train control system. It is not a strike.

    The direct RER B is interrupted between Paris and CDG for most of July and August 2026. Fastest options: Roissybus from Opéra, taxi/Uber, or the CDG Express when running.

    Yes. RATP has made line 14 free for the whole duration of the central closure (25 July – 16 August 2026) so passengers can cross Paris north–south without the RER B.

    Yes — trains still run on the outer branches and terminate at Gare du Nord on surface platforms 32 and 33. But you cannot cross Paris on the RER B during the closure.

    Full service on the central section resumes on 17 August 2026. The CDG branch resumes normal service after 31 August 2026.