Evaluating Pavement Strategies and Barriers for Noise Mitigation (2013) / Chapter Skim
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57 Summary The methodology developed in this research provides a means of evaluating pavement strategies and barriers together for feasibility, reasonableness, effectiveness, acoustic longevity, and economic features. The primary elements of the approach include the following: • The use of OBSI data to account for the effect of pavement performance on tire noise source levels • The use of FHWA TNM with a modification to adjust for tire–pavement noise based on OBSI data • The use of LCCA to compare the costs of barriers, quieter pavement, and combinations of pavements and barriers.
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58 pavement in the project area and comparing them to the levels predicted after the project is complete. However, if both the existing pavement and the candidate pavement alternatives produce higher levels, an effective solution will not be obtained.
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59 the example cases, the predicted levels for the noisier and quieter pavements were about as expected relative to TNM Average Pavement. The use the GLSS-modified TNM with SRTT OBSI data could be used in future traffic noise studies as developed in this research.
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