Abstract
As part of a survey dealing with the effects of road traffic noise, 2933 persons resident at 53 sites in Greater London were interviewed, noise levels at the dwelling façades were measured and the volume and composition of the traffic at each site were counted. After preliminary study of the data, the total sample was subdivided into two subsamples according to the flow and arrival pattern of traffic. The first subsample, in which free flow conditions prevailed, has already been reported in a companion paper [1]. The second subsample, where free flow conditions were not maintained, consisted of 1574 persons resident at 29 sites. For this subsample it was not found possible to obtain predictions of nuisance from existing noise measures of sufficient accuracy to be of practical use. However, a measure of traffic composition was found to yield useful predictions. The total sample was subsequently re-examined and a measure using a weighted combination of noise levels and traffic composition was found to give useful predictions for a wide range of traffic conditions. Possible reasons for the findings are discussed, together with the results of applying unified noise nuisance indices to the survey data.
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