The alcan highway is pretty long, and passes through some pretty remote regions. You'd have to run cables from the alcan down to Skagway, and then you'd have to

The alcan highway is pretty long, and passes through some pretty remote regions. You'd have to run cables from the alcan down to Skagway, and then you'd have to run cables underwater to connect the various coastal communities that are on islands, or far from developed roadways. Juneau, Ketchikan, Sitka, Wrangell, Petersburg are all communites with 2,000-30,000 people, and none of those communites connect to the outside world by road.