Management and Maintenance of Sign Bridges, Cantilever Sign Structures and Mast Arm Structures on French National Roads Network

The 11,000 km of roads in France's national network not under private concession are equipped with over 8,000 Gantry, Crane and High Mast signs. Such structures entail significant economic and legal consequences in the event of insufficient maintenance. Ensuring these resources remain in a good state of repair has become an imperative for road user safety, with these stakes becoming even higher in some regions where climate swings will exert direct influence. The French guide on maintaining and managing these road facilities defines the basic relevant concepts (e.g. description, technical context, responsibilities) and then lays out the corresponding three-stage process: 1) developing a comprehensive knowledge of the resource base; 2) monitoring and evaluating; and 3) performing the necessary maintenance and repairs. This methodology may be transposed to other countries. Effective monitoring naturally begins with inventorying the resource using appropriate tools and organization. This monitoring effort includes safety patrols and can be divided into: - an annual structural inspection in order to identify problems potentially jeopardizing safety; - an evaluation visit held once every 3 years targeting the state of repair. For this visit, conducted without any special means of access, each deficiency recorded gives rise to a quote for repairs. - a periodic in-depth inspection, scheduled every 6 years (at most) and carried out by specialists given the means to fully access the structures. These monitoring actions result in contracting for maintenance and repair works. Ongoing maintenance, particularly at the level of anchorages, has helped to considerably extend the life cycle of these facilities. Specialized maintenance focuses on the structure's protective elements and minor flaws. Moreover, information is provided on the need for major repairs (methods, computations, etc.). Out of concern over the cost and reliability of repairs, it is necessary however to plan for the eventual replacement or definitive removal of the signs. The Massif Central Interdepartmental Roads Directorate, which actively contributed to this guide in the capacity of project owner, manager and operator, has implemented these directives by incorporating supervisory and maintenance issues related to Gantry, Crane and High Mast vertical signs into the management of engineering structures. Practical examples (data sheets, catalogue of defects, actual disorders, repairs ordered) might also be presented.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 9p
  • Monograph Title: Proceedings of the 25th World Road Congress - Seoul 2015: Roads and Mobility - Creating New Value from Transport

Subject/Index Terms

Filing Info

  • Accession Number: 01710487
  • Record Type: Publication
  • ISBN: 9782840604235
  • Files: TRIS
  • Created Date: Jun 26 2019 3:40PM