The SILVIA Guidance Manual on the implementation of low-noise road surfaces Workshop: location and date Information Network Information Network on QUiet European on QUiet European road Surface road Surface Technology Technology
Dec 15, 2015
The SILVIA Guidance Manual on the implementation of low-noise road surfaces
Workshop: location and date
Information Network Information Network on QUiet Europeanon QUiet Europeanroad Surface road Surface TechnologyTechnology
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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
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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
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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
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1: Background information
• 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
Equal Loudness Contours
Tread block slip
Block impact Block
snap-out
Driving direction
Air pumpingTread block slip
Block impact Block
snap-out
Driving direction
Air pumping
Tyre noise generation mechanisms
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2. Overview of existing surfaces
• Review of existing low-noise surfaces Overview 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)
Slip-form paver
3rd generation rollable surface
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3. Specifying the performance
• 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
Measuring mechanical impedance
CPX measurement system
SPB measurement
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4. Quantifying the benefits
• 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
Rolling resistance trailer
Splash-spray on dense asphalt
Splash-spray on porous asphalt
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5. Performance of low-noise surfaces
• 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.
Noise Barriers
Traffic calming measures
Surface expansion joints
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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: