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E. Pucher, J. Litzka, J. Girard, J. Haberl:
"Integration Of Powertrain and Tyres With Low-Noise Road Surfaces";
Talk: FISITA 2004 World Automotive Congress, Barcelona, Spanien; 2004-05-23 - 2004-05-27; in: "FISITA 2004 Congress Proceedings", STA - Sociedad de Técnicos de Automoción, f2004cd (2004), Paper ID F2004V138, 12 pages.

The EU-project SILVIA - Sustainable Road Surfaces for Traffic Noise Control - aims at providing decision-makers with a tool allowing them to rationally plan traffic noise control measures. The main final product will be a European Guidance Manual on the Utilisation of Low-Noise Road Surfacings" integrating low-noise surfaces with other traffic noise control measures including vehicle and tyre noise regulation, traffic management and road and building noise protection equipment. Low noise road surfaces can achieve substantial reductions in street traffic. However, in order to take advantage of the low noise surfaces, the integration of the surfaces with other noise abatement measures must be explored. This is accomplished in work package WP5 of the project.

The objectives are:
To describe noise reduction solutions taking into account the combination of pavement and tyre design.
To address noise reduction possibilities by assessing other vehicle noise sources (e.g. reducing engine and drive train noise).

Preliminary examinations have demonstrated that the behaviour of the pavement referring to the tyre noise is different for passenger car tyres and the tyres of trucks. A road surface for low tyre noise of trucks might be different from a pavement for low passenger car tyre noise. The influence of operating conditions - cruise-by and accelerated pass-by as well as driving in a gradient and curve - on the noise will be investigated. Special regard will be drawn to the share of the drive train noise of important vehicle concepts.

Where noise problems are most severe, a combination of noise reducing measures will be required and it will not always be possible to simply add the acoustic benefits of each to obtain the combined effect. This is the case where a low-noise surfacing is used with roadside noise barriers and earth mounds. The combined effect can be less than the added benefits and the discrepancy tends to increase with barrier height. The aim will be to provide guidance on the way in which the discrepancy varies under different conditions.

The spectral characteristics of noise from low noise road surfaces will influence the attenuation of the broadband noise level over different ground surface types with and without roadside barriers. It will be important to specify how the noise advantage of the low noise surfaces vary with height and distance from the road.

Integrating low-noise surfaces with low-noise powertrain and tyres, the results of the above effort will be used to produce a guidance manual on "Advanced Low-Noise Highway Design" to help decision-makers to rationally plan noise control measures taking into account full life-cycle costs.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04968930

Project Head Ernst Pucher:
EU-Projekt-SILVIA