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交通噪声一直是城市噪声污染的主要污染源。尽管桂林市实施了禁呜、部分线路单行、改善路况等措施 ,但随着车流量迅速增长 ,交通噪声超标仍较严重。监测结果显示 :各主干道噪声等效 (A声级 )声级较为接近 ,其在干道隔离带、人行道、居住区分别为76 1～ 79 4dB ,74 0～ 77 0dB ,63 7～ 69 4dB ;在昼间主干道交通噪声的LAeq,LA10 ,LA50 ,LA90 各时段变化不显著 ;在垂向上 ,最大交通噪声出现在 1 0～ 1 5m高度。道路沿线建筑、绿化、坡降、路面宽窄、交通管理等对等效声级也有很大影响。对此 ,结合城市规划 ,道路建设、交通管理、综合治理等方面提出了针对性的控制对策。
Traffic noise has always been the main source of pollution in urban areas. Despite the implementation of the ban in Guilin, some lines of a single line, to improve road conditions and other measures, but with the rapid growth of traffic flow, traffic noise is still more serious than the standard. The monitoring results show that the sound level of the equivalent A sound level of each main road is relatively close, with 76 1 ~ 79 4dB, 74 0 ~ 77 0dB and 63 7 ~ 69 4dB respectively in the trunk isolation zone, sidewalk and residential area; In the daytime, the traffic noise of main road LAeq, LA10, LA50 and LA90 did not change significantly in different periods; in the vertical direction, the maximum traffic noise appeared in the height of 10 ~ 15m. Roads along the building, afforestation, slope, pavement width, traffic management and other equivalent sound level has a great impact. In this regard, the combination of urban planning, road construction, traffic management, comprehensive management and other aspects of the proposed control measures.