Managing Natural Hazards in Road Networks: A Case Study in the Principality of Andorra

Roads running through mountainous areas are often exposed to natural hazards such as landslides, rock falls, debris flows, and others. In order to manage the risk of these hazards over road networks, a methodology has been developed and successfully applied in the Principality of Andorra. This methodology can be exported to all road networks which pass through areas affected by natural hazards. This methodology was first applied in 2001, when a national mapping of natural hazards was conducted. Through this mapping, stretches of road associated with a significant hazard level and which involved a high risk were identified. Once the road network had been divided into different stretches, with a gradation of hazard levels, the government had a tool for risk management. The input needed then was to conduct a study of the risk level, which was done according to the average daily traffic (ADT) of each road stretch. Combining different natural hazard levels with the ADT, one can obtain different values which are used by the administration in order to have control over those areas with a higher natural hazard risk; in this way, one obtains a prioritization of areas on which action to minimize risk is needed.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Photos; References; Tables;
  • Pagination: 8p
  • 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: 01670601
  • Record Type: Publication
  • ISBN: 9782840604235
  • Report/Paper Numbers: 0274
  • Files: TRIS
  • Created Date: May 20 2018 2:30PM