Abstract
It becomes effective for analysis such as with evaluation of ride comfortable of road user and noise vibration problems that grasping rougghness of road surface when evaluates service ability of pavement. By the development of measurement device that road surface property was automatic, collection of vertical section unevenness data became possible in 0.25 m interval in extension direction by usual vehicles traveling speed. We carried out analysis about data interval for the evaluation that was reasonable rougghness and carried out analysis about the unit section that evaluated rougghness length. Furthermore, we carried out comparison examination about IRI and rougghness suggested in world bank as an index of ride comfortable.
