The Seward Highway is located in coastal Alaska and is subject to an extreme maritime climate, with strong
winds, and large storms that can bring several meters of snow to the start zones and total snow in the start
zones often exceeding 10 m per year. The highway extends for over 200 km through steep glacially carved valleys, from Seward to Anchorage, Alaska. Along its route, from mileposts 18 (29 km) to 107 (171 km), avalanche
paths threaten the road and in many cases these avalanches flow down from their starting zones in excess of
1000 m above the road.