Establishment of Network Trigger Values for Pavement Management Rehabilitation

Most agencies use performance models to forecast future rehabilitation needs using a composite index (Pavement Condition Index - PCI) to provide a single number describing pavement condition. For long term planning when the PCI drops below a certain trigger value rehabilitation is planned. In the 1980’s, Public Works and Government Services Canada, Parks Canada and the Yukon Government introduced the same management systems for their pavements and bituminous surface treatments (BST). One of the challenges was ensuring that the weighting factors for the various distresses correctly reflected pavement condition when the composite indices were calculated. Initially, to aid in this process the rating panel of senior engineers was asked to recommend a rehabilitation strategy based on the field observations that were then compared to the ratings of the various distresses. The objective of this paper is to validate the relationship between trigger values, panel recommendations and composite condition indices. This study involves the comparison of field recommendations and the composite indices for over 3,900 pavement ratings and 7,400 BSTs. It indicates that there is a distinct value of PCI/BCI (BCI is the condition index for BSTs) where the panel recommended a rehabilitation such as an overlay and a further intervention level at which a more major rehabilitation is required.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 11p
  • Monograph Title: 7th International Conference on Managing Pavement Assets, June 23-28, 2008, Calgary, Alberta, Canada: "Preserving What We Have, Investing in the Future, and Finding the Balance"

Subject/Index Terms

Filing Info

  • Accession Number: 01447694
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 28 2012 3:30PM