L SUB EQ TRAFFIC NOISE PREDICTION METHOD

The development, accuracy, reliability, and application of the L sub eq highway noise prediction method developed in Ontario are outlined. This empirical method for predicting energy-equivalent sound levels is based on 182 sound measurements taken near rural and urban freeways, highways, and residential streets. The method is in the form of a nomograph and can be used to predict traffic noise on both highways and residential streets. The standard error of estimate for the L sub eq method was about 2.24 dBA. Comparisons of measured and calculated L sub eq levels indicated that this method is more accurate than the Revised Design Guide method of the National Cooperative Highway Research Program. The paper also outlines a simple method for direct prediction from annual average daily traffic volumes of day-night A-weighted equivalent sound levels (L sub dn) caused by traffic noise. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 48-53
  • Monograph Title: Environmental and conservation concerns in transportation: energy, noise, and air quality
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183516
  • Record Type: Publication
  • ISBN: 0309026776
  • Report/Paper Numbers: HS-024 285
  • Files: TRIS, TRB
  • Created Date: Dec 12 1978 12:00AM