this report describes a study of the costs of conforming to a range of noise standards by several different means. three sites were studied where recent new road construction schemes were near concentrations of houses. the study indicated that there was no great difference in costs between a solution using double glazing only, and one that used a combination of double glazing and a barrier, the latter combination appearing slightly cheaper. if the standard were improved from 68 db(a) to 64 db(a) the marginal cost was found to be about 50 per cent.(a)

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