The maintenance of low-noise road surfaces requires special consideration both of the parameters involved and the methods used. If pavement management takes into account the noise emission parameters of road surfaces, they can act as efficient noise abatement measure especially in urban environments. The noise output of both low-noise and ordinary road surfaces changes over time and is influenced by maintenance operations. For ordinary pavements, the focus must be to preserve and not compromise the current noise performance. Low-noise road surfaces, especially the porous varieties, require special attention to both acoustic and related non-acoustic parameters. The tools for maintaining those are available, but the procedures still show potential for improvement. This report presents the basic principles, the relevant parameters, case studies and guidelines for maintaining low-noise road surfaces.
The aim of this document is to
• Present an overview of maintenance options, both general and specific to low-noise pavements
• Underline the importance of monitoring noise-related road surface characteristics to efficiently plan and use maintenance actions
• Show case studies of maintenance operations on low-noise road surfaces including an analysis of their acoustic impact
• Give general recommendations concerning the maintenance of low-noise pavements.
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