Serious traffic delays can be expected from Friday, July 27 to Monday, July 30, as holidaymakers cross over on their departures and returns.

The fourth weekend of the summer period is also the first crossover and is notorious for its traffic jams and accidents. This year the challenge will be increased by the very hot weather.

Heavy traffic is expected around the major cities in the Paris region, in the Rhone Valley and around the Mediterranean.

The A8, between Aix-en-Provence and Nice, will be the most problematic in both directions, with the lunchtime hours being the most challenging.

Saturday is expected to be the worse day in the South, from 09:00 until 20:00.

The A7 towards the South will be difficult, especially from as early as 05:00 on Saturday until 18:00 as holidaymakers travel from the Paris region.

Sunday, July 29, traffic will intensify in the direction of returns in the late afternoon and early evening.