Faced with an aging road infrastructure and a shrinking highway maintenance budget, the Saskatchewan Department of Highways and Transportation (SHT) needed to optimize the allocation of limited highway resources. SHT decided to accurately quantify vehicle operating costs on various roads under diverse operating conditions. Although SHT had previously used the HDM III model, the extensive data requirements of HDM III led SHT to initiate a review of available cost models to identify a model that would suit their specific needs. No such model was found; therefore, a mechanistic-probabilistic vehicle operating cost (PVOC) model was created to estimate vehicle operating costs of different vehicles using different roads in Saskatchewan conditions. The PVOC model calculates a probabilistic estimate of vehicle operating costs, which includes the expected value and the associated uncertainty of the estimate. The PVOC model was found to be within 20 percent of published industry averages and within 9 percent of historic Saskatchewan truck fleet data.


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  • Accession Number: 00726124
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Sep 28 1996 12:00AM