Restricted area of a PPRT on the Meuse department

For PPRTs, the environmental code defines a single category of zones for zones (L515-15 et seq.): areas at risk. Unlike natural RPPs, PPRTs never have restricted areas that are not directly exposed to risk.
Depending on the hazard level, each TRPP area is subject to an enforceable settlement. The PPRT regulations generally distinguish two types of zones:
1- ‘Building prohibited areas’, known as ‘red areas’, where the hazard level is high and the general rule is the prohibition on construction;
2- ‘prescribed areas’, known as ‘blue zones’, where the hazard level is average and the projects are subject to requirements adapted to the type of issue.
The instructions in the PPRT development guide add a gradation within the “red zones” and “blue zones”.

针对技术风险预防规划（PPRT），环境法典为（L515-15及后续条款所涵盖的）区域划定了单一类别的区域，即风险区域。与自然风险规划（RPPs）不同，PPRT从不包含未直接面临风险的限制区域。
根据危险等级的不同，每个TRPP区域均需执行可强制执行的管控要求。PPRT相关法规通常将区域划分为两类：1. ‘建筑禁建区’，又称‘红色区域’：该区域危险等级较高，通用规则为禁止建设活动；2. ‘指定管控区’，又称‘蓝色区域’：该区域危险等级中等，相关项目需遵循适配问题类型的管控要求。
PPRT编制指南中的相关指引，在‘红色区域’与‘蓝色区域’内部增设了分级体系。