Towards the application of stress-in-motion (SIM) results in pavement design and infrastructure protection

Road infrastructure needs constant protection and it is therefore necessary to understand the ever-changing operating conditions. Statistics on inter-regional traffic in Southern Africa indicate that there is severe overloading of heavy vehicles - up to as much as 70 per cent overloading. The aim of this paper is to highlight the approach and application of the Stress-In-Motion (SIM) technology to assist in an improved definition of the actual tyre/pavement interaction of modern heavy vehicles and their loads on the current road infrastructure. Experience indicates that it is difficult to measure these tyre/pavement interaction forces from real trucks and that the measuring equipment is expensive and difficult to maintain. However, efforts have been made in South Africa to gain an improved quantification of the shape and magnitude of the three-dimensional tyre/pavement forces measured from real trucks. In the paper some SIM data sets collected on two National Highways in South Africa are also briefly discussed. Lastly, this paper provides an initial discussion on potential truck tyre parameters envisaged for Performance Based Standards (PBS) on flexible pavements.


  • English

Media Info

  • Pagination: 19p
  • Monograph Title: Loads roads and the information highway: 8th International Symposium on Heavy Vehicle Weights and Dimensions, 14-18 March 2004, Misty Hills Conference Centre, Muldersdrift, Gauteng, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01390950
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 1920017305
  • Files: ATRI
  • Created Date: Aug 23 2012 5:09AM