Abstract
The purpose of this study is to obtain basic data to examine plans of cites, regions and constructions and their standards, taking into consideration plans for preventing snow and ice disasters. We investigated the snow damages from 1971 to 1990 in Hokkaido and analyzed the restraints on the traffic, the cancellations of trains and the power breakdowns due to the disasters. The results show that disasters have decreased in number in all the categories and that normal services are usually resumed within three days. They also show that many snow damages are caused by snowstoms which may be influenced by the wind velocity and the temperature.
