Five different types of surfaces were used: thick, smooth ice, thin ice (0,3 mm) on a smooth pavement and on a rough pavement and wet asphalt pavement, both smooth and rough. The friction test vehicle bv 5 of the institute was used to measure the braking performance. The tyres used were both unstudded and studded cross bias- and radial ply winter tyres and special tread rubber tyres. One cross bias summer type was used for reference purpose. The studs were both steel studs and plastic studs. The results show that the effect of studs on the braking performance on thin ice on A smooth pavement is about the same as on thick smooth ice. On thin ice on a rough pavement the winter tread design seems to improve the braking performance and the stud effect is less important. The studded radial ply tyres had a small braking performance advantage when compared to the studded cross bias tyres. Unstudded tyres with special tread rubber and conventional tyres with special studs sometimes have improved braking performance on ice compared to summer tyres but are not much better than conventional unstudded winter tyres. /TRRL/


  • Swedish

Media Info

  • Features: Figures; Tables;
  • Pagination: 47 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133682
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: No. 65
  • Files: ITRD, TRIS
  • Created Date: Jun 23 1976 12:00AM