Adjustment factors for noise levels on various types of pavement were developed by considering the individual vehicle readings and the traffic stream recordings. The individual vehicle noise readings showed that, after exposure of 10 million vehicle passes, only Kentucky rock asphalt and sand asphalt surfaces give consistently low values. Grooved concrete exhibits noise levels of 73 dBA. All other surfaces showed normal noise levels. Truck adjustments were determined form noise recordings on the different types of surfaces as well as the reference truck data on grooved concrete. By comparing predicted with measured noise recordings, several conclusions were reached. Actual values on new class 1 surfaces were quieter than predicted, but worn class 1 surfaces showed noise levels similar to those predicted. The other types of surfaces showed very little differences between predicted and measured levels. Thus no adjustment was considered necessary for trucks on the surfaces for which noise recordings were taken. The reference truck data indicated that no adjustment for trucks was necessary for ground concrete surfaces. There is a definite advantage in considereing adjustments seperately for cars and trucks. In most cases, the noise level for trucks predominates in the traffic stream. However, when car noise predominates, a separate adjustment for cars would make predicted levels more accurate. Recommended adjustments for car and truck noise levels are given.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 43-45
  • Monograph Title: Pavement design, evaluation and performance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00156001
  • Record Type: Publication
  • ISBN: 0309220710
  • Files: TRIS, TRB
  • Created Date: Aug 15 1977 12:00AM