1. Murphy, R., Swick, R., Hamilton, B.A., Guevara, G.: Best practices for road weather management, Version 3.0, Federal Highway Administration (FHWA), Office of Transportation Operations Washington DC 20024, Report No. FHWA-HOP-12-046, pp 92 (June 2012)
2. Harada, Y., Omiya, S., Takechi, H., Nishimura, A.: Investigation of evaluation indexes for severe snowstorm events, Proceedings of XVIth World Winter Service and Road Resilience Congress, Calgary, pp. 1–12 (2022)
3. Matsuzawa, M.: Relation between snow transport rate and visibility using the estimation model on mass flux of snow, Annual Report on Snow and Ice Studies in Hokkaido, No. 39, pp 39–42 (written in Japanese), (2020)
4. Cabinet Office: Government of Japan, Guideline of evacuation information, pp32 (2021)
5. Takeuchi, M.: Visual range in airborne snow particles. J. Geogr. 100(2), 264–272, (1991). (written in Japanese with English abstract)