Evaluating Pavement Strategies and Barriers for Noise Mitigation (2013) / Chapter Skim
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Pages 21-25
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From page 21... ...
21 Introduction The methodology proposed for evaluating pavement and barrier strategies for noise mitigation considers five factors: feasibility, reasonableness, effectiveness, acoustic longevity, and economic issues. Under the approach encompassed in this methodology, feasibility and reasonableness can be evaluated following basic definitions provided in 23 CFR 772 and the accompanying guidance document although some modification of these factors will be required for pavement consideration.
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From page 22... ...
22 cases, mitigation in the form of either added barriers or quieter overlays may not be feasible due to weight limitations on these structures. For new highway projects, the added weight would need to be considered in the design and the increase in the initial cost needs to be considered in the LCCA for the project.
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23 effectiveness is linked to reducing complaints by residents near the highway. In this research, effective noise abatement alternatives are defined as those providing the lowest overall highway noise level with the lowest amount of variation in noise reduction performance.
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24 them has some implications on the effectiveness of the noise abatement design. In cases where unfavorable environmental conditions (e.g., downwind wind conditions, temperature inversions, or rainy conditions)
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25 For pavement, cost baseline needs to be established for a pavement that would be actually used if noise abatement was not considered in the pavement selection together with the associated OBSI level (and acoustic longevity and non-acoustic rehabilitation cycle cost if available)
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