The purpose of this paper is to discuss the economic effectiveness of a wide range of maintenance treatments that are being used in metropolitan Melbourne were examined using the World Road Association's HDM-4 life cycle model that takes into account both road agency and vehicle operating costs. The south eastern metropolitan road network was divided into cells consisting of four pavement types, five traffic ranges and five roughness ranges. Then ten different maintenance treatments at various intervention levels, comprising 144 maintenance alternatives in total, were applied to these cells. The net present values of each of these treatments relative to the base case of routine maintenance were then determined and plotted against the cost of these treatments to provide an efficiency frontier of the most cost effective maintenance treatments. It was necessary to calibrate HDM-4 to the characteristics of pavement deterioration, vehicle operating costs and the effect of maintenance works in metropolitan Melbourne. In particular, the reduction in pavement roughness from the use of ultra thin asphalt overlays was investigated. The results showed that the most cost effective treatments were those that reduced pavement roughness levels to below 2 IRI and that ultra thin asphalt overlays were therefore effective on the majority of relatively smooth pavements in this road network. Traditional rehabilitation treatments using thicker asphalt overlays were effective at higher pavement roughness but were applicable to only a small percentage of roads. The most cost effective treatment for sealed pavements was surface regulation followed by another sprayed seal.


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  • Accession Number: 00964364
  • Record Type: Publication
  • ISBN: 087659229X
  • Files: TRIS, ATRI
  • Created Date: Oct 15 2003 12:00AM