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This project aims at the optimisation of new road pavement concepts with respect to tyre-road noise in a wider context of the abatement of road traffic noise. French and German institutes headed by the "Laboratoire Central des Ponts et Chaussées" (LCPC) in Nantes and the "Bundesanstalt für Strassenwesen" (BASt) in Bergisch Gladbach cooperate throughout this project, which will finish in October 2008. The theoretical approach is based on the SPERoN ("Statistical Physical Explanation of Rolling Noise") model developped by one of the partners (Müller-BBM) and already implemented and tested in Germany on a large set of measurements carried out on the experimental Sperenberg site near Berlin. In a first stage, the model was validated for different kinds of French road surfaces. In a second step, the model was applied as an adapted tool to design new textures for low noise road surfaces. Finally, in a third step, the results issued from SPERoN were used as an unput for outdoor sound propagation models developed in France and Germany in order to estimate the effect of this optimised model-aided low noise pavement in the far field, close to the façades. A ranking with other typical German and French pavement will lead to a common database (DEUFRABASE). The near field evaluation is important in terms of pavement classification (current databases) while the far field estimation is important in terms of environmental impacts, with respect for instance, to the European Environmental Noise Directive (END). |
