Road traffic noise has become one of the major urban pollution sources.
交通噪声已成为城市主要污染源之一。
Previous planning is the reason of some region road traffic noise index exceeding;
部分区域噪声污染指标超标与早期规划有关；
Urban road traffic noise approximately composes above city region ambient noise 80%.
其中城市道路交通噪声约占城市区域环境噪声的80%以上。
Road surface, other traffic, wind noise and driving speed all contributed to the cacophony.
路面，其他交通工具，风声和行驶的速度都会不同程度产生刺耳的声音。
Road surface, other traffic, wind noise and driving speed all contributed to the cacophony.
路面，其他交通工具，风声和行驶的速度都会不同程度产生刺耳的声音。
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