A study of pavement noise for asphalt pavements with different service life in national highway

Currently, asphalt pavement is covered about 90% of the national highway. The average service life of national highway is 8~9 years. In this study, the characteristic of sound pressure level(SPL) and frequency from traffic noise of asphalt concrete pavement(ACP) is evaluated according to service period. In order to find relationship between ACP's service life and traffic noise, the traffic noise from asphalt concrete pavement was collected and analyzed. The traffic noise was measured by the statistical pass-by method(SPB) that consisted of placing microphone at a defined distance from vehicle path at the side of the roadway was adopted. The analysis was evaluated the traffic noise by comparing 1/3-octave band frequency characteristics of traffic noise from asphalt concrete pavement that was three different service life: new pavement(0 year), 6 years and 10 years. Based on both SPL and 1/3 octave band frequency analysis, the SPL of 6 years asphalt pavement was shown the highest number, 78dB(A). Also, The SPL of the vehicle type, the SUV than passenger car was the highest with the average 78.8dB(A). The total Frequency range of the pavement life type and the vehicle type was a range of 400Hz~2500Hz.. According to noise characteristics results of the ACP life, in the existing literature and our result has produced different results. Later, after additional field noise test, Evaluation using the statistics technique is required.