基于 FHWA 模型与交通流仿真的道路噪声预测方法研究

以美国FHWA噪声模型为基础，以VISSIM软件为交通流预测平台，给出了基于FHWA模型与交通流仿真的道路噪声预测方法，实现了通过现状调查数据对拓宽后路段进行噪声预测的目的；并以南京航空航天大学附近的一段双向6车道的高速路作为研究对象，结合实际路况及统计学理论对噪声预测模型进行修正，修正模型的预测结果与实测值的误差在1．5 dB范围内，匹配性良好；在对拓宽后的道路噪声预测后发现：道路拓宽之后的噪声值总体呈增高趋势；交通量增加之后，噪声值进一步加大；另外，虽然大中型车在交通量中占据较小的比例，但对交通噪声值的大小起决定性作用．

Traffic Noise Prediction Method Based on FHWA M odel and T raffic Flow Simulation

In this paper ,a noise prediction method based on a classic model and traffic flow simulation was defined to predict the road traffic noise after its widening on the basis of survey data .The re-search chooses the two-way six-lane freeway near Nanjing University of Aeronautics and Astronautics campus as the object of study ,and modifies the noise prediction method on the basis of existing road conditions and statistical theory ,with an acceptable error within 1 .5dB .The prediction results show that the road noise after widening forma rising trend overall ;the noise further increases with the ex-pand of traffic flow ;large and medium-sized vehicles play a decisive role in the traffic noise values ,al-though they only occupy a small proportion of traffic flow .