The use of noise models is briefly reviewed, comments are made on the stakes involved in the use of noise models, and the essential ingredients of a noise model are outlined. Models are an important supplement to measurements of existing noise levels. Where noise is predominantly from highway traffic, the model can be used as a time and money-saving aid to interpolate between sites where measured data have been obtained. The models also serve to examine various mitigation strategies, and to predict future noise levels (on which government controls and development plans are based). They are used in the assessment of impact of highway improvement and of design alternatives. As an illustration of the stakes involved in the use of noise models, it is noted that in FY 1974, about $13 billion was spent in local, state and federal funds on highway improvements. Current estimates indicate that about $32.5 million per year will be spent no noise barriers as part of the construction or reconstruction of freeways and expressways. Models are required to account for traffic characteristics, topography and in special situations, meteorological conditions and pavement characteristics. The models must be simple and easy to use. Accuracy is identified as the most important criterion which must be fulfilled by the noise model.

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Filing Info

  • Accession Number: 00131394
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 14 1976 12:00AM