Highway Traffic Noise Prediction Model Analysis Comparative Study

There are two widely used models for predicting noise levels in transportation. One is recommended by the Chinese Transportation Ministry and is specified in 'Assessment Criteria for Environmental Impact from Road Construction Projects, JTJ005-96' (to be referred as Prediction Model from Transportation Ministry). The other is recommended by the National Environmental Protection Bureau and is published in 'The General Guidelines for Environmental Assessment Technologies桽ound Environment, HJ/T2.4?995'. This model is the high way noise prediction model from the United States Federal High Way Authority (FHWA). This thesis compared the above two models. By using both the Prediction Model from Transportation Ministry and the FHWA models, the prediction results were analyzed for high ways at different sections, different design speeds, detection points, traffic volumes, distances, heights, and at various other road conditions. The prediction results and the actual results were compared and the accuracy of prediction were assessed. It was found that the FHWA model gave a more accurate prediction. After a detailed literature review and by conducting experiments, the FHWA model was revised. In order to assess the rationality and accuracy of the revised FHWA model, it was used under various road traffic conditions. The actual results were compared with the results obtained from the revised model. The final conclusion was that the revised FHWA model is both versatile and accurate.