Possibility of international standardization of road traffic noise prediction model - Part 2 Application of JARI model to low-noise type road surfaces

摘要

To investigate the reduction measures of road traffic noise effectively, it is useful to establish a calculation model which can be applied to roads in different countries. We have reported in a previous paper (Part 1) that the road traffic noise calculation model developed by Japan Automobile Research Institute (JARI) is applicable also to the urban roads in European countries which are paved with dense asphalt concrete. However, in Europe, various types of road surfaces have been developed for noise reduction. Therefore, for further investigation of an internationalization of the road traffic noise calculation model, it is necessary to establish a model applicable also on low-noise road surfaces developed in different countries. In this study, firstly, the sound power levels of road vehicles on low-noise road surfaces in the Netherlands were measured and the calculation model for them was made. Secondly, the road traffic noise calculation model developed by JARI was applied to urban roads of the low-noise road surfaces in the Netherlands and the noise levels at roadside points were calculated. The values of L_(Aeq) calculated using the JARI model were fairly in good agreement with the measured values within 2 dB. Consequently, it has been found that the JARI model is applicable also to urban roads of the low-noise road surfaces in Europe.