Greening attenuation of noise was affected largely by belt width.For wider tree belt, the inner half close to noise source had more significant effect to reduce traffic noise than the outer half.

• 交通噪声的绿化衰减同林带宽度有很大关系，对于较宽林带，靠近声源前半部分的林带对噪声有较好的减轻作用，但后半部分的减噪效果较小。