THE RATING AND MEASURING OF ROAD ROUGHNESS ON GRAVEL ROADS

MATNING OCH BEDOMNING AV OJAMNHETER PA GRUSVAG

An investigation was carried out with the object of finding, first, a limit value for acceptable comfort when driving and gravel roads and secondly, an method suitable for the measurement of road roughness on gravel roads giving data directly comparable with the road-users' experiment of comfort. 13 subjects rated their experience of comfort. The ratings were carried out in a bus on twenty road sections representing varying degrees or roughness. Simultaneously with these ratings, road roughness was measured with the PCA Road Meter, the Bump Integrator, and a new road meter called the BV11J. This road meter is based upon a frictional road meter, BV11, developed at the National Road Research Institute, a predecessor to the present National Road and Traffic Research Institute. The BV11 has been augmented with a unit for the measurement of road roughness, thus making it possible to measure friction and roughness at the same time. When comparing the results obtained from the subjective ratings and those from the objective measurings of road roughness, the PCA Road Meter proved to be a more consistent, or more likely to be a valid, instrument than the two other s which are equal in this respect. The two-fold measuring fuction of the BV11J offers many practical advantages. The choice of a suitable measuring equipment is thus between the PCA Road Meter and the BV11J. The evaluation of the higher validity in the PCA Road Meter compared to the two-fold measuring feature of the BV11J will determine the choice. A limit value for acceptable comfort, resulting from the ratings of road roughness, was shown to be well in accordance with a limit value for acceptable comfort on secondary truck roads found in the some way but in another context. /Author/

• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • MAGNUSSON, G
  • Arnberg, P W
  • PETTERSSON, H E
• Publication Date: 1977

Language

• Swedish

Media Info

• Features: Figures; References; Tables;
• Pagination: 67 p.

Subject/Index Terms

• TRT Terms: Comfort; Friction; Gravel roads; Measuring instruments; Ratings; Road meters; Roughness; Secondary roads
• Uncontrolled Terms: Bumps
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00164103
• Record Type: Publication
• Report/Paper Numbers: Report No. 123
• Files: TRIS
• Created Date: Oct 29 1977 12:00AM