A study was carried out aiming at elucidating the significance of road roughness for road users experience of comfort, and at finding an objective method for measuring road roughness, giving data directly comparable with the road users experience of comfort. Ratings of the experience of comfort were carried out in passenger cars, trucks and in a bus. The results showed that the road users accepted longer exposure time for road roughness on roads of relative smoothness than would be expected from the iso reduced comfort boundary. For rougher roads the estimated acceptance time approached the iso boundary. Ratings of acceptable levels for discomfort on four different kinds of roads resulted in a recommendation for the establishment of a roughness standard. Three of the four road meters that were used produced results well in accordance with the results from the subjective ratings. Only one of these, however, the so-called PCA road meter, can be recommended for more extensive measurements regarding road building and road maintenance. A road roughness indicator of a bump integrator equipped with the measuring system of the PCA road meter might be an even better alternative. This construction was not, however, studied. /TRRL/


  • Swedish

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 82 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00137815
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: Rapport NR-83
  • Files: ITRD, TRIS
  • Created Date: Apr 13 1977 12:00AM