Joining this conversation late. I've been watching the Alaska Flying shows the last couple of seasons, and every time I think the same thing; if they'd just put in an interstate highway system up there, most of the flying would stop. If you watch the various shows, a lot of the flying is to take people to medical care, shipping basic supplies, or even just a school sports team going to an event. An interstate system would end all of that, and the only flying left would be to the remotest towns or back country strips (kind of like the lower 48 now).