Road Surfacings - Noise reduction time history

The European project SILENCE contained a task to provide models for the effect of pavement ageing on the noise reducing effect of road surfacings.The basis was existing historical data on noise performance, analyses of data from sections of road with known history, and data from new supplementary measurements at sites where measurements had been carried out in the past.This task complements the pavement classification made in another task based on the pavement acoustic performance when new.No indication was found that any model (polynomial/logarithmic/exponential) would yield better fit to the data than a simple linear relation between vehicle noise level and pavement service time.This may be due to large scatter in measurement results.A clearer pattern might have appeared if each surface had been characterized by the total traffic load it had carried rather than by its number of years in service.However, such data were not available.The slopes to be expected for the linear time history of vehicle noise levels are:For both light and heavy vehicles, the slope at dense asphalt surfac-ings is in the order of 0.1 dB per year of pavement service time.This applies to high speed as well as low speed roads.For porous or open graded asphalt surfacings the expected time history slope for light vehicles is in the or-der of 0.4 dB per year at high speed roads and 0.9 dB per year at city streets with low traffic speed.Heavy vehi-cle noise levels can be expected to increase with 0.2 per year at high speed roads.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9788792094353
• Authors:
  • KRAGH, J
• Publication Date: 2008

Language

• English

Media Info

• Pagination: 76
• Serial:
  • ROAD SURFACING - NOISE REDUCTION TIME HISTORY
  • Issue Number: 161
  • Publisher: Danish Road Directorate

Subject/Index Terms

• TRT Terms: Asphalt; Noise; Porous materials; Research projects; Seal coats; Tire/pavement noise
• Geographic Terms: Denmark
• Subject Areas: Environment; Highways; Research; I15: Environment; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01116744
• Record Type: Publication
• Source Agency: Danish Road Institute
• ISBN: 978-87-92094-35-3
• Files: ITRD
• Created Date: Dec 22 2008 8:15AM