Overview
- Friday, December 19 is rated orange for departures nationwide and red in Auvergne‑Rhône‑Alpes, with congestion expected from early afternoon into the evening.
- Major slowdowns are forecast on routes to the Atlantic, the Channel and the Mediterranean, notably the A7, A10, A11, A13, RN165, A8, A9 and A50.
- In Île‑de‑France, the overlap of holiday departures with trips to large shopping areas is expected to make traffic difficult near tolls until early evening.
- For returns on Friday, Bison Futé flags orange conditions in much of the north, the western façade and Auvergne‑Rhône‑Alpes, with likely delays on the A1, A2, A25, A10, A11, A7, A41, A43, A46, A47 and A48.
- Saturday, December 20 is generally green for departures, though sustained congestion is expected in Auvergne‑Rhône‑Alpes on the A40, A43 and A46 and at Mont‑Blanc tunnel access, with time‑specific advice such as avoiding A7 and A9 peak windows and leaving or crossing Île‑de‑France outside advised hours; separate farmer actions, especially in the South‑West, could still trigger local blockages.