Forget the road. It's the worst alternative. The road would be a maintenance Black Hole and a danger to life and limb, so much of it teetering on the edge of a plunging landscape and crossing scores of avalanche chutes.
The Alaska Marine Highway System has been neglected, but its infrastructure can be upgraded at much less cost than building a road. Ferries take people where they want to go. Has anyone figured out that we live in an archipelago? In our case, we have islands and parts of the mainland separated by water, which is our true route of passage. Why is that so hard to figure out?