R111-3 de Chantelouve approved on 02/04/1979

Risk prevention plans (RPPs) are the State’s key instrument for risk prevention. Their objective is to control development in areas at risk. The development of a PPR generates a spatial dataset organised into several data sets. The same PPR includes the spatial datasets containing: — scope of exposure to risks, — restricted areas of the plan once approved. The RPP regulations distinguish between ‘Building prohibited areas’, known as ‘red areas’, where the general rule is the prohibition on construction; ‘required areas’, known as ‘blue zones’ where projects are subject to requirements adapted to the type of issue and hazard, and areas not directly exposed to risks but subject to prohibitions or requirements. The data are informative, only paper documents with the prefecture’s visa are authentic.