Traffic noise annoyance near light controlled intersections
✍ Scribed by R.R.K. Jones; D.M. Waters
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 298 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0003-682X
No coin nor oath required. For personal study only.
✦ Synopsis
Four hundred noise samples were taken at varying distances from three lightcontrolled intersections, from which the increments in percentile level above those predicted for the equivalent free flow ease were derived. No factors other than those included in the prediction method could be discerned, and linear regression of the whole sample was used to establish the relationship between the increment, AI_~, and distance, x (m), from the intersection, e.g. ALxo = 3.21 -O.Olx. A postal social survey with 12 environmental questions was sent to 30 subjects at each of six free and six interrupted flow sites, where 18-h noise measurements were made. A 69 per cent response was obtained. The slope of the regression line between question scores and Lxo was found to differ between free and interrupted flow, but those against Lso were similar. The'dissatisfaction' score and a composite'annoyance' score correlated well, O" 76, but 'dissatisfaction' gave a slightly higher score for free flow than interrupted, and'annoyance' the reverse. This suggests that Lso is a useful indicator of subjective response if both free and interrupted flows are involved. However the data also supports the use of the logarithm of percentage of heavy vehicles as an indicator of dissatisfaction in the interrupted flow case. TABLE 1 COMMENTS IN RESPONSE TO QUESTION (14)