Every summer and autumn, the multi-site highway administration bureau decides when to open to traffic according to the snow and road conditions. The time is probably from May to June. As for the road closure time, it also depends on the weather. Every year, roads are closed around 10- 1 1.
The opening hours of Duku Highway are from June to September. If there is heavy snow, the road will be temporarily closed until the snow is cleared. It is recommended to go from the end of June to August.