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Prices for the pollution rating Crit’air sticker for vehicles has been reduced from €4.18 to €3.62. Covering six categories from Green for electric vehicles to Grey for vehicles with Euro 2 pollution ratings, the stickers allow councils to ban vehicles during pollution peaks.

Paris has the most restrictive measures, a weekday ban on Grey and non-classified cars, while Grenoble, Lille, Lyon, Strasbourg and Toulouse have other options. Foreign vehicles also need a sticker. See .