The effects of cold overlay surface treatments on traffic and vehicle noise

During 1989 ARRB was contracted by the Environmental Planning Section of the Roads and Traffic Authority NSW (RTA) to investigate the acoustic performance of a range of road surface treatments. That study revealed how road traffic noise is affected by surface treatment and culminated with some recommendations for low noise surface selection. One of the surfaces included in the study was a Cold Overlay slurry seal which produced only moderate acoustic performance. Since then some alternative designs for the Cold Overlay surface treatment have been developed and two trial sections were laid in outer Sydney during 1990. ARRB then undertook, under contract to the RTA Blacktown Office to determine the acoustic performance of these surfaces in the same manner as the 1989 study. The latter study is documented in this report. It was found that the noise output decreased as the Cold Overlay surface coarseness decreased. The surface with the finest texture was recommended for applications of Cold Overlay where noise is an issue. This surface produced road noise levels in the low end of the range exhibited by all the surfaces tested in the 1989 and 1990 studies. The levels on this surface lie between those of a Dense Graded Asphaltic Concrete and a Hessian Dragged Portland Cement Concrete surface.

  • Record URL:
  • Availability:
  • Supplemental Notes:
    • The ISBN of the microfiche version is 0-86910-513-2
  • Corporate Authors:


    Melbourne, Victoria  Australia 
  • Authors:
    • Samuels, S E
    • Roper, R L
  • Publication Date: 1991-8


  • English

Media Info

  • Pagination: 13p
  • Serial:
    • Issue Number: ARR 208

Subject/Index Terms

Filing Info

  • Accession Number: 01432427
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 869105124
  • Files: ATRI
  • Created Date: Aug 24 2012 5:01PM