Towards incorporating heavy vehicles into the Austroads sprayed seal design method

There has been a continual increase in the number of large heavy vehicles nationwide since the review of the Austroads sprayed seal design method in 2001. This report aims to refine the traffic adjustment factor by updating and reanalysing the loading effect of heavy vehicles on the seal surfacings. Two seal design factors for heavy vehicles are devised: damage factor (DF) and equivalent heavy vehicle based on the definition that a Class 4 (3 axle truck) was the standard vehicle (EHVDF) (cf. existing definition of EHV that is based on the annual average daily traffic data). A total of 126 million weight-in-motion (WIM) data from the rural regions obtained during the period from 2007 to 2011 were provided by Australian jurisdictions. The analysis process used in the report could be adapted to data derived from specific locations or across a particular state. A proportional distribution of vehicle fleet composition was derived from the WIM data for each jurisdiction. DF and EHVDF for each vehicle class in relation to a Class 4 vehicle were also derived for each jurisdiction.


  • English

Media Info

  • Pagination: 30p + appendices

Subject/Index Terms

Filing Info

  • Accession Number: 01518424
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9781925037517
  • Report/Paper Numbers: AP-T260/14
  • Files: ITRD, ATRI
  • Created Date: Mar 18 2014 12:11PM