Abstract
This study aims to propose the research method for evaluating the problems of the road on snowy season and to clarify its usefulness. First, the delay time is defined as an index of road service level, and the method of collecting the delay time data is described. Next, the factors concerning with the delay are shown as road structure, traffic condition and weather. Then, the data are collected from actual traffic survey and road management map and the generating structure of the delay time is clarified by the analysis using quantification theory type I . Finally, as an application of the delay time, we investigate the places that need to improve against snow.
