TIRE/ROAD NOISE ON AN OPEN-GRADED FRICTION COURSE

A significant part of traffic noise is caused by the interaction of tires with the road. A relatively efficient way to abate tire/road noise is to use a road pavement with low-noise characteristics. A pavement group considered beneficial for noise suppression is the so-called open-graded pavements, where the finegraded portion of the material is very small resulting in a surface with many interconnected open channels able to efficiently drain water and air in the tire/road interface through the road surface. Measurements of tire/road noise from one tire type have been made for speeds of 70 and 90 km/h on two pavements, one of which is an open-graded friction course and the other a conventional, dense-graded asphalt concrete pavement. It was found that the open-graded pavement reduced tire/road noise by 3db(a) relative to the dense pavement. In relation to the latter pavement, the noise reduction was considerable at high frequencies, whereas there was some impairment at low frequencies. A reduction of 3 db corresponds to a halving of sound energy. Concerning noise, the tested open-graded pavement is certainly better than the presently common dense pavements, but the data also indicate that it is not quite as efficient for noise suppression as an earlier tested open-graded pavement type. Possible ways to optimize noise qualities of open-graded friction courses are discussed. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03476030
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • Sandberg, U
• Publication Date: 1981

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 16 p.
• Serial:
  • VTI Rapport
  • Issue Number: 221A
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 0347-6030

Subject/Index Terms

• TRT Terms: Alternatives analysis; Asphalt concrete; Dense graded aggregates; Open graded aggregates; Rolling contact; Sound level; Wearing course (Pavements)
• ITRD Terms: 4921: Bitumen macadam; 4967: Bituminous mixture; 5440: Contact (tyre road); 9009: Decrease; 6136: Measurement; 6748: Sound; 6747: Sound level; 1381: Tyre
• Subject Areas: Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00349516
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 30 1982 12:00AM