Map visualisation service (WMS) of the dataset: Restricted zones of PPRN GRAND LYON: LYON VILLEURBANNE

For natural PPRs, the environmental code defines two categories of zones (L562-1): risk-exposed areas and areas which are not directly exposed to risks but on which measures may be foreseen to avoid exacerbating the risk.Depending on the level of hazard, each area shall be subject to an enforceable settlement. The regulations generally distinguish between three types of zones:1- the so-called “red zones” where the hazard level is strong and the general rule is the construction ban;2- “prescription zones”, known as “blue zones”, when the hazard level is average and projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, structures, development or agricultural, forestry, artisanal, commercial or industrial activities could exacerbate or cause new risks, subject to prohibitions or requirements (cf. Article L562-1 of the Environmental Code). The latter category applies only to natural PPRs.