PREDICTION OF FREEWAY NOISE LEVELS (L10): AN EVALUATION OF THE U.K. DEPT. OF THE ENVIRONMENT PROCEDURE

This paper was presented at Session 30 - Noise and Environmental Studies. The U.K. Department of the Environment has published a method of predicting road traffic noise levels (1 10)from traffic parameters and roadway geometry. To test this prediction procedure, L 10 (half hour) and 1 10 (18 hour) were measured and predicted at 17 sites near the south-east freeway, brisbane. Road traffic volumes used in the predictions were those measured simultaneously with the noise levels. Predicted and measured l 10 have been plotted for each half-hour of the day at the 17 sites. The study included locations beside cut, fill and at-grade sections of the freeway, often with sites of very complex acoustical geometry. Agreement between the measured and predicted levels was good for all site conditions. (Over all sites the mean difference in L 10 (half hour) was 0.7 db(a), over-prediction, with standard deviation of the differences 1.7 db(a).) The method can be recommended for adoption where prediction of l 10 noise levels is required, at least for the range of traffic and geometry conditions covered in this study. A relationship between l eq and l 10 has been given which allows estimates of 1 eq to be predicted by the DOE procedure. (TRRL)

  • Record URL:
  • Supplemental Notes:
    • Proceedings from the Ninth Australian Road Research Board Conference, Brisbane, August 21-25, 1978.
  • Corporate Authors:

    ARRB Group Limited

    500 Burwood Highway
    Vermont South, Victoria    3133
  • Authors:
    • Brown, A L
    • Hollingworth, G H
  • Conference:
  • Publication Date: 1979

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 248-262
  • Serial:
    • Volume: 9
    • Issue Number: 6

Subject/Index Terms

Filing Info

  • Accession Number: 00310038
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • Files: ITRD, TRIS
  • Created Date: Jul 22 1980 12:00AM