This paper describes an experimental investigation into the unscreened and screened propagation of traffic noise over a flat grassland site. Measurements, associated with traffic counting, were made at a range of receiver positions out to 115m from the road edge and up to 12m high, under a wide range of wing conditions. The barrier was 300m long and was tested at 3.05m high and also at 1.83m high. Early measurements of unscreened propagation in this investigation were used in the formulation of the BRE method for predicting traffic noise in terms of the L10 index. The data from the whole investigation are used to compare the L10 predictions, by this method and by an alternative method, with measurements made without a noise barrier and the measurements with a barrier are compared with the BRE predictions. A modification to the BRE prediction method is suggested to improve accuracy for partially screened reception positions. The results of the measurements with screening confirmed the need for barriers to be very long. The adverse influence of loss of ground effect on actual noise reductions at the receivers, as previously predicted, was also indicated. /TRRL/

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  • Corporate Authors:

    Academic Press Incorporated

    Berkeley Square House, Berkeley Square
    London W1,   England 
  • Authors:
    • Scholes, W E
    • Salvidge, A C
    • Sargent, J W
  • Publication Date: 1975-2-8

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  • Accession Number: 00125214
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Nov 18 1975 12:00AM