Journal of the Korean Geographical Society ISSN:1225-6633(Print) 대한지리학회지

On March 1, 2021, hundreds of vehicles were isolated due to heavy snow in Yeongdong, Gangwon-do. In Korea, there is a lot of mountainous terrain in Gangwon-do, so it is necessary to manage steep slopes where there is a risk of vehicle isolation during heavy snowfall. Currently, for road maintenance management in winter, Korea Expressway Corporation designates and manages road sections vulnerable to snow damage. However, this is text-oriented information, and has a limitation in that uphill information cannot be obtained for road sections that are not vulnerable to snow damage. Therefore, this study tried to derive the steep uphill section where vehicle isolation occurs for the Hobeop-Gangneung section of the Yeongdong Highway. To this end, the uphill criterion was set, and uphill slope sections were extracted and compared using digital topographic maps and LiDAR data. In order to reflect the geometric elements of the road and the icy road surface, the steep uphill section derived from this study and the icing vulnerable section of the Ministry of Land, Infrastructure and Transport were compared to finally derive the icing accident risk section. In conclusion, it was confirmed that high-resolution LiDAR data should be used to minimize the uphill section that is missed in medium resolution. The ice accident risk section derived from this study is expected to be used as basic data to prevent icing accidents in the future.