Long-term Effectiveness of Sinusoidal Hump - Focusing on the Acceptability of Local Residents

Abstract

Humps were legally accepted in Japan as a part of road structure by a revision of the Road Construction Ordinance in April, 2001. Although there were various studies on effects of humps on speed reduction, effects of accident reduction were not found in the literature of hump studies. In addition, it should be noted that previous studies mostly focused on 1 year-afterinstallation-effect. A longer effect of hump was not observed. Therefore, the objective of this study is to investigate accident reduction effect and long-term effectiveness of permanent sinusoidal humps. Further efforts were made to grasp local residents' acceptability of permanent sinusoidal humps. According to the findings of this study, accident rate was reduced approximately 2.3 accidents per year by setting sinusoidal humps. In addition, the local residents' acceptability was increased when there is a playing ground for children located near the sinusoidal hump setting place.