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- W590960190 abstract "Under contract to the Environmental Planning Section of the Roads and Traffic Authority, NSW a series of traffic and vehicle noise measurements was made in the Sydney environs during mid 1989. Analysis of these data was aimed at determining the effects of road surface treatment on roadside noise levels, with particular emphasis on high speed roads. Road surface treatments included three types of Portland Cement Concrete, four Open Graded Asphaltic Concretes (OGACs), a conventional Dense Graded Asphaltic Concrete, a Cold Overlay Slurry Seal and a 14 mm Chip Seal. It was found that the road surface treatments produced a substantial 9.7 dB(A) variation in traffic noise levels. The currently used 1987 specification Open Graded Asphaltic Concrete proved to be the quietest surface and offered L10(1h) reductions of 3.3 and 6.3 dB(A) over Hessian Dragged and Shallow Grooved Portland Cement Concretes and 5.9 dB(A) over the Dense Graded Asphaltic Concrete. Two polymer bound OGAC surfaces tested were found to produce the same noise levels as the 1975 specification OGAC. The traffic noise levels associated with these three surfaces would be 2 dB(A) greater than those of the 1987 OGAC. In addition, they provide a 4 dB(A) improvement over conventional dense graded asphaltic concrete. A 14 mm chip seal investigated would generate traffic noise levels some 2 dB(A) higher than the dense graded surface. Finally, the effects of road surface type were observed to be similar in both the traffic and the vehicle noise data. Road surface treatments produced similar effects on car and heavy vehicle noise levels (A)." @default.
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- W590960190 date "1990-05-01" @default.
- W590960190 modified "2023-09-23" @default.
- W590960190 title "THE EFFECTS OF ROAD SURFACE TEXTURE ON TRAFFIC AND VEHICLE NOISE. RESEARCH REPORT" @default.
- W590960190 hasPublicationYear "1990" @default.
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