Road contact stresses and forces under tires with low inflation pressure

RA Douglas, David Woodward, Alan Woodside

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Many field trials have been undertaken to demonstrate the benefits of reducing the inflation pressure of the tires of heavily loaded haul vehicles, but few carefully controlled laboratory studies have been performed. An earlier full scale laboratory study indicated that tire inflation pressure had far less effect on subgrade strains for unpaved, single-layer granular road structures than the tire loading itself, so attention was directed to the behaviour of the granular base at the tire tread - road surface interface. In the present paper, the results of full scale tests performed using a laboratory apparatus designed to measure the dynamic vertical, transverse, and longitudinal contact forces under tires with varying loads and inflation pressures are reported. Vertical contact forces were observed to be highly non-uniform, both across and along the contact patch.
Original languageEnglish
Pages (from-to)1248-1258
JournalCanadian Journal of Civil Engineering
Issue number6
Publication statusPublished (in print/issue) - Dec 2000

Bibliographical note

Hard copy in BERI office.


  • central tire inflation systems
  • CTI
  • model study
  • haul trucks
  • unbound roads
  • unpaved roads
  • access roads


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