RER B service disruption announced

The RER B will be out of service between Aulnay-sous-Bois and Mitry-Claye on Saturday, November 7 and Sunday, November 8, 2026. This interruption is part of scheduled maintenance for the railway infrastructure in the northeast branch connecting Seine-Saint-Denis to Seine-et-Marne.

Replacement shuttle service provided

A replacement shuttle, identified as B3, will operate between the affected stations. It will run from Aulnay-sous-Bois to Mitry-Claye via Sevran-Livry, Vert-Galant, and Villeparisis–Mitry-le-Neuf, offering an alternative to the interrupted train service.

Travelers advised to adjust plans

Passengers traveling through Aulnay-sous-Bois, Sevran, or Villepinte will need to adjust their travel plans for the two days. The affected stations—Sevran-Livry and Vert-Galant—are located between Aulnay-sous-Bois and Mitry-Claye on the usual route to Paris or Seine-et-Marne.

Shuttle schedule and frequency details

The B3 shuttle will run from 5:00 to 1:20 from Aulnay-sous-Bois and from 4:30 to 0:15 from Mitry-Claye, with frequencies ranging from 5 to 15 minutes depending on the time of day. Travelers should be aware that the service extends past midnight and should consider the relevant travel day.

Ticket requirements for shuttle service

A valid RER B ticket is required to use the replacement shuttle. The Bus-Tram ticket alone is not accepted on these buses. Travelers should confirm their ticket before boarding the shuttle to avoid issues.

Additional disruptions planned

A second complete interruption of the RER B between Aulnay-sous-Bois and Mitry-Claye is scheduled for November 21 and 22, 2026, with the same B3 shuttle service expected to be in place. Travelers are advised to check the official alternative route section for details on affected stops and schedules.