WET ROAD SKIDDING RESISTANCE - THE RELATIVE CONTRIBUTION OF THE TYRE AND OF ROAD SURFACE TEXTURE

A detailed investigation has been made of the skidding resistance of smooth and patterned tyres with different treads of seven polymers. The tyres were tested over a very wide speed range (1 to 140 km/h) on eight test track surfaces characterised by different micro and macro textures. These tests formed part of a road and laboratory programme to investigate the complex visco-elasto hydrodynamic mechanism of tyre/wet road friction. In practice it was found that the effects of extremes of surface are greater than the extremes of tyre tread polymer and pattern combined. Though all factors can play a part in providing good tyre/road grip in wet conditions the relative importance of the tyre and road surface texture reverses over the practical motoring speed range. It appears that hysteresis alone does not account for the high skidding resistance measured on some surfaces at high speeds but that the sequence of events arising from hysteresis losses on rough surfaces creates tyre/road contact conditions corresponding to lower speeds so that adhesion becomes directly and hysteresis indirectly responsible for the increased skidding resistance. /Author/TRRL/

  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Lupton, G N
    • WILLIAMS, T
  • Publication Date: 1974

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 22 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097226
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: TRRL SR 86 UC
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1975 12:00AM