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SILVIA Guidance Manual: Low-Noise Road Surfaces Implementation Workshop

The SILVIA Guidance Manual is the comprehensive output from the SILVIA project, offering key research findings and results in an accessible format for Highway Authorities, Contractors, and Environmental Planners. It covers existing surfaces, performance specification, benefits quantification, surface evaluation, and advice on selection and assessment of low-noise surfaces. Discover background information, measurement methods, safety and sustainability benefits, and factors influencing surface performance. Available for free download at the project website.

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SILVIA Guidance Manual: Low-Noise Road Surfaces Implementation Workshop

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  1. The SILVIA Guidance Manual on the implementation of low-noise road surfaces Workshop: location and date Information Network on QUiet European road Surface Technology

  2. The SILVIA Guidance Manual • The main output from the SILVIA project • A summary of all of the key research and results from the project • Written for the non-expert • Freely downloadable from project website www.trl.co.uk/silvia

  3. Intended audience • Highway Authorities • Planning of traffic noise control measures • Specification of the performance of surfaces • Highway Contractors • Meeting contract and product specifications • Acoustic labelling of surface products • Environmental Planners • Improvement of noise predictions • Development of Noise Action Plans

  4. Overview of contents • PART 1: Background information • PART 2: Overview of existing low-noise surfaces • PART 3: Specifying the performance of low-noise surfaces • PART 4: Quantifying the benefits of low-noise surfaces • PART 5: The performance of low-noise surfaces • PART 6: Advice on low-noise surfaces

  5. 1: Background information Equal Loudness Contours Tyre noise generation mechanisms • The evaluation of noise An overview of the issues relating the physical measures used to describe noise with perception and annoyance • Overview of vehicle and tyre/road noise A description of the various noise sources associated with vehicle noise emission and the important surface parameters necessary for the characterisation of a road surface

  6. 2. Overview of existing surfaces Slip-form paver 3rd generation rollable surface • Review of existing low-noise surfacesOverview of existing surfaces used in Europe • Review of existing construction/ maintenance techniques An overview of available methods including cleaning & winter maintenance • Prospects for further developments The opportunities for acoustic optimisation, structural durability improvement & new concept surfaces Stone Mastic Asphalt (SMA)

  7. 3. Specifying the performance SPB measurement CPX measurement system Measuring mechanical impedance • Overview of measurement methods: A summary of recognised methods used for obtaining measurement data and new methods developed within the project that are not yet recognised as standard. Certification procedures are also described • Proposals for a noise classification procedure: The background to the SILVIA system and the procedures defined for acoustic labelling, conformity-of production assessment & routine monitoring

  8. 4. Quantifying the benefits Splash-spray on dense asphalt Splash-spray on porous asphalt Rolling resistance trailer • Safety and sustainability benefits of low-noise road surfaces A summary of current knowledge on safety aspects and the effects of using the surfaces on factors such as water pollution, material use, recycling and fuel consumption • Cost-benefit analysis Description of the application spreadsheet cost-benefit tool developed in the project

  9. 5. Performance of low-noise surfaces Surface expansion joints Noise Barriers Traffic calming measures • Factors affecting the performance of low-noise surfaces The influence of local conditions on surface performance, e.g. roadside developments, fleet composition, repairs and joints, weather effects, etc • The integration of low-noise surfaces with other mitigation measures An overview of the influence of other types of noise mitigation measure on the performance of low-noise surfaces.

  10. 6. Advice on low-noise surfaces • Advice on the selection of low-noise surfaces Summary of the conclusions from the previous chapters of the manual and advice on other considerations, e.g. change in performance over lifetime • Advice on the assessment of surfaces Summary of the procedures developed in SILVIA for COP assessment and routine monitoring • Appendices:

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