I live in AK now and have been to Nome where gas is $6 a gallon
Why? Because there's no ROAD INFRASTRUCTURE to Nome
You not only have to build a bridge to one of the most remote parts of the Seward Peninsula - You have to then build an entire road for hundreds of miles down the Seward Peninsula to Fairbanks over land that is varying between Permafrost and regular road - (and you can build for one or the other but the permafrost is changing) - Sure, you could build an "Ice Road" but same situation -
I'm not saying it's the WORST idea in the world - Anchorage has the 2nd busiest Air Cargo terminal in the US - (Nashville is 1st I think) and we're ideally situated for Air over the North Pole, and maybe Naval thru the Northwest passage, - but there's no Rail line - and no Road from the Seward Peninsula to the Lower 48 - Hell, half the villages out there are still on the honey bucket system. The Bridge would probably come ashore at Wales, and you can drive to Nome - but from there you're back to Cargoship - so will the US create that kind of Infrastructure in AK? We can't even get the broken stuff fixed so I don't foresee new stuff.
FYI - the Road to Nome has been tossed back and forth but there's no palate in AK right now for new Infrastructure since the budget deficit caused by dropping oil prices.