Differentiated traffic was set up on Saturday 25 January for the first time in Saint-Etienne and some surrounding municipalities due to an episode of pollution with fine particles, announced the prefecture and the city.
Only vehicles displaying an air quality certificate (Crit’Air sticker), “zero engine emissions,” or Class 1, 2, 3 are authorized to circulate from Saturday morning within an area delimited by the A72, RN88 and DR axes. 201, which are themselves excluded. The sector affects parts of Saint-Etienne, Saint-Genest-Lerpts and Villars, according to the prefecture decree. The public transport network of the STAS agglomeration will be free on Saturday, the city of Saint-Etienne said on Twitter.
Since Thursday, all the main roads in the Loire where the authorized speed limit is normally greater than or equal to 90 km / h were affected by a speed reduction of 20 km / h. The ATMO Auvergne-Rhône-Alpes air quality observatory deplores meteorological conditions “favorable to the accumulation of pollutants emitted in the lower layers” over the region. Sixteen of the twenty-one air basins in Auvergne Rhône-Alpes are affected, with eight air basins in red vigilance in particular.
In Lyon, Villeurbanne and Caluire-et-Cuire, the differentiated circulation has been reinforced since Saturday morning and only vehicles fitted with a Crit’Air “zero engine emission” sticker , 1 or 2 can circulate. Differentiated traffic is also in force in the metropolitan area of Grenoble, in ten municipalities in the Lyonnais / Nord-Isère basin such as Bourgoin-Jallieu, Saint-Quentin-Fallavier and Vienne, as well as in Annecy and Chambéry.