Modelling of aging of low noise road surfaces

Noise reducing road surfaces tend to lose their reducing performance over time. It is observed that the magnitude and the time dependency in performance loss varies significantly over the types of surfaces and over the traffic conditions these surfaces are exposed to. This study investigates the mechanisms causing the loss in performance and identifies the parameters that are affecting the magnitude and the time dependency of the performance loss. The noise reducing effect is explained by the surface texture, the acoustic absorption and the flow resistivity of the surface and each of these properties may change over time due to stone loss, clogging or filling of the porous surface. Data from several surfaces and surface types was collected from different areas in Europe. Traffic conditions were mainly highway and regional traffic. Urban traffic is only limited taken into account. The study resolved relevant parameters and was able to determine components for a prediction formula. It was concluded that a significant part of the variance, however, could not be explained by type and traffic parameters and has to be attributed to either unknown environmental factors and quality aspects of the surface material itself.

Language

  • English

Media Info

  • Pagination: 8p
  • Monograph Title: Transport Research Arena (TRA) 2014 Proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01534619
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: VTI, TRIS, ATRI
  • Created Date: Aug 14 2014 10:16AM