Tire-pavement and environmental traffic noise research study.
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2012-06-01
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Abstract:In response to an interest in traffic noise, particularly tire–pavement noise, CDOT elected to conduct tirepavement
noise research. Following a rigid set of testing protocols, data was collected on highway traffic
noise characteristics along with safety and durability aspects of the associated pavements. This report
completes a comprehensive, long-term study to determine if particular pavement surface types and/or
textures can be used as quieter pavements, and possibly be used to help satisfy FHWA noise mitigation
requirements. The study addressed: The noise generation/reduction characteristics of pavements as functions of pavement type, pavement
texture, age, time, traffic loading, and distance away from the pavement; Correlations between source measurements using on-board sound intensity (OBSI) and wayside
measurements including both statistical pass-by (SPB) and time-averaged measurements; and The collection of data that can be used for validation and verification of the accuracy of the FHWA
Traffic Noise Model (TNM) to use on future Colorado highway projects.
Implementation:
There are numerous findings from this study, along with associated implementation activities. The most
promising finding is that each of the common pavement types in use by CDOT has the potential for quieter
variants. As a result, implementation of this study could include the identification and specification of the
specific asphalt mixtures and concrete textures that result in quieter pavements without compromising on
safety or durability.
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