We could imagine that road construction in artic is something uncommon and very difficult. Indeed, it is difficult, but not so uncommon. The important is to take care about the foundation (as usual), but here the problem is with unfreeze and freeze back of the active layer of the permafrost. So the point is to allow settlement during the first thawing period and to refurbish for the final level. Of course, no bituminous product (unable to resist to the winter) but concrete, and the pre-cast slabs are the solution.