CHARACTERISTICS OF ROAD DUST AND EFFECT OF ROAD SWEEPING IN TERMS OF AESTHETIC BEAUTY IN SAPPORO CITY

Abstract

  Because road sweeping cannot be carried out during winter in cold region, road dust in early spring increase. Although all roads managed by Sapporo city are divided into six ranks and their road sweeping frequencies in early spring are provided more than theses in regular season, the effect of road sweeping has not verified yet. In this study, we found that the accumulation process and grading of road dust in both seasons. The aesthetic beauty of roads with various amount of road dust was scored by public and the optimal road sweeping frequencies necessary for aesthetic beauty were obtained. Moreover, we discussed the validity and improvement of present road sweeping frequencies in Sapporo city.