The fields of competence of the National Roads Administration are very diverse and include:
- Intervention plans for motorway tunnels
- Road signs
- Operation of the motorway network
- Extensive mowing
- Airport
- Tree pruning
- Analysis and testing of materials
- Topographic and photogrammetric products
- Road-building permits
- Maintenance of the road network
- Traffic management
- Installation and maintenance of lighting on state roads, motorways and tunnels
- Geological studies/surveys
- Policing of the state’s public highways network
All these competences are described in detail on the French version of the site.