Abstract
In the arterial road, achievement ratio of environmental standard of road traffic noise is low. In the various noise reduction, countermeasure to sound source is effective regardless of distance and height from the road. Therefore, noise reduction quantity and the improvement of achievement ratio according to sound source countermeasure was examined for the Kitakyushu City. Still, introduction of small low-noise cars and construction of drainage pavement were taken up as countermeasures. By constructing drainage pavement of small aggregate grain diameter and introducing small low-noise cars, rate for meeting environmental quality standards were improved from 28 with 87% in the daytime, and it was improved from 32 with 69% in the night.
