Abstract
In this paper, reduction of road traffic noise near trunk road was investigated quantitatively, when the following countermeasures were accepted against noise sources. First of all, when low-noise vehicles such as electric ones were used widely, reduction of road traffic noise was calculated. Now vehicles travel with an equal and constant speed on a road. Because we can guess not only low-noise vehicles but also diesel trucks will be driven on a road even in the future, reduction of road traffic noise was quantitatively determined according to several scenarios, for example, a scenario that all vehicles were replaced to low-noise ones, a scenario that both passenger cars and light trucks were replaced to them, and so on. Furthermore, when roads were paved with drainage asphalt in addition to low-noise vehicles widespreading as a countermeasure, reduction of road traffic noise was calculated.
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