Tire-Pavement Noise Characteristics by Traffic Level and Vehicle Speed using CADNA-A Software

摘要

In order to quantify traffic noise in accordance with changing vehicle speed, vehiclespeed limit, traffic volume, heavy vehicle ratio, and the geometric conditions have to beconcerned. However, the Pass-by method which is most common conventional testmethod has a limitation. It is difficult to quantify a traffic volume because of controlboth vehicle speed and real time changed traffic volume. Therefore, a noise change isrequired to predict using a variety of noise simulations and it needs to be verified atfield test in the future. In this study, Cadna-A software was used to analysis noise nearroad as changed vehicle speed. The analysis results shown that the noise level of40km/hr speed limit was lower than 110km/hr speed limit with 4.6dB(A). It indicatesthat the noise reduction effect of slow-speed section was greater than that of the highspeed section depending on same traffic volume. In case of 50% less traffic volume, thetraffic noise decreased about 3dB(A). However, the noise was increased 3dB(A) as thetraffic volume increased by 100%. By measuring noise location, noise differencemeasured at 1.5m height between horizontal distance of 10m, and 20m is 4.6dB(A),noise difference measured at 15m height between horizontal distance of 10m and 20mdecreases 1.7dB(A), and noise difference measured at 20m height between horizontaldistance of 10m and 20m decreases 1.3dB(A). The suitability of the results from thisstudy should be examined with the actual field test results further.