The fact
Traffic is classified as red in Auvergne-Rhône-Alpes, with congestion upstream and downstream of the city.
Motorists are advised to postpone their trips or use alternative routes.
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Why it matters
Ces perturbations affectent des milliers d'automobilistes en pleine période estivale, avec des risques d'embouteillages prolongés et de retards pour les vacanciers.