Overview
- Bison Futé elevated Saturday departures to black in Auvergne-Rhône-Alpes and red nationwide, marking the highest congestion warnings for this summer wave.
- Sytadin reported 247 kilometers of traffic jams in Île-de-France by midday Friday, confirming the intensity of gridlock on key arteries.
- Critical bottlenecks formed on the RN165, A10 and A11 toward the Atlantic, on the A8 and A9 to the Mediterranean, and through the Mont-Blanc tunnel approaches.
- Motorists encountered multi-hour standstills by Saturday morning, particularly on routes feeding Île-de-France and southeastern highways.
- Return traffic is forecast to intensify Monday afternoon under orange alerts in Île-de-France and Provence-Alpes-Côte d’Azur, prompting drivers to adjust travel plans.