ANNUAL WORTH COST ANALYSIS OF PAVEMENT REHABILITATION

The rehabilitation of pavements can be regarded as a cycle of gradual depreciation and subsequent replacement of the capital invested in the pavement layers of roads. The capital recovery cost is functionally related to the strength of the pavement and the life-cycle length between rehabilitation measures, which is the basis for annual worth cost analysis of any rehabilitation measure. Whereas the cost of such measures is composed of a fixed term and a term which varies with overlay thickness, the life-cycle length is dependent on the acceptable minimum performance or serviceability level and the strength of the rehabilitation pavement structure. These relationships and a financial equation for annualized costs are the basic modules of the proposed modelling. The problem of salvage value is illustrated but can be avoided by applying the "repeatability assumption" of financial analysis. This means, with regard to pavements, that the same measure of rehabilitation must be used at the same "trigger point" of acceptable minimum performance. Based on the author's earlier modelling of the AASHTO Road Test and Brampton Road Test data, and on inventory data collected and modelled in Ontario, a form for the life-cycle length function has been derived and discussed. Ontario 1984 cost data were used to give an example of calculation of annualized costs. If user costs are not included in the analysis, single overlays done more frequently seem to be economical compared to multi-course overlays and less frequent rehabilitations. (Author)

  • Supplemental Notes:
    • Papers presented during the Proceedings of the Roads and Transportation Association of Canada, Annual Conference, September 1985, Vancouver British Columbia. Volumes 1 and 2.
  • Corporate Authors:

    Transportation Association of Canada (TAC)

    Ottawa, Ontario  Canada 
  • Authors:
    • Jung, F W
  • Conference:
  • Publication Date: 1985

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 173-197

Subject/Index Terms

Filing Info

  • Accession Number: 00453610
  • Record Type: Publication
  • Report/Paper Numbers: Volume 1
  • Files: TRIS
  • Created Date: Jul 31 1986 12:00AM