Overview

• The southern RER B branch from Massy-Palaiseau to Croix-de-Berny will be closed July 15–August 27 with replacement buses in operation.
• RER C will be closed July 15–August 23 on the main axis between Paris-Austerlitz and Avenue-Henri-Martin and on the Versailles-Château, Saint-Quentin-en-Yvelines and Massy–Pont-de-Rungis branches.
• Major metro disruptions include line 3 closure between Opéra and Gallieni until August 3 and line 7 full closure between La Courneuve–8-Mai-1945 and Chaussée-d’Antin–La Fayette from July 18 to July 24, both with substitute bus services.
• SNCF Transilien will deploy 20,000 buses and coaches for about 40,000 summer trips and reinforce 52 regular bus lines across 13 operators to compensate for train interruptions.
• Nighttime roadworks will partially or fully close segments of the A1, N118, A6, A6a, A6b, A126 and sections of the Boulevard Périphérique through early August.