International Conference on Transportation and Development 2020
A Comparative Study of Insertion Loss of Traffic Noise Barriers in Georgia
Publication: International Conference on Transportation and Development 2020
ABSTRACT
In this paper, three types of traffic noise barriers, interlocking steel panels, precast concrete panels, and Paragon panel 23-T, were evaluated in terms of insertion loss. Field test was conducted for the noise barriers recently installed as part of the Northwest express project in Georgia. The noise insertion loss was measured as noise difference in A-weighted decibels (dBA) immediately before and behind the barriers. To assess the effectiveness of noise barriers, the measured insertion loss was correlated with barrier types conditional upon other explanatory variables, including the separation distance of barriers from traffic, the level of traffic, wind speed, and pavement types. The results showed that under prevailing conditions, all three barrier types achieved an insertion loss in the range of 7.02 dBA to 13.58 dBA, exceeding the noise reduction design goal of 7 dBA as stated in the Georgia Department of Transportation’s noise abatement policy. Among the three barriers, the Paragon panel 23-T effected the highest insertion loss, followed by the precast concrete panel barriers and the interlocking steel panel barriers.
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Information & Authors
Information
Published In
International Conference on Transportation and Development 2020
Pages: 131 - 139
Editor: Guohui Zhang, Ph.D., University of Hawaii
ISBN (Online): 978-0-7844-8313-8
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Aug 31, 2020
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