There is no such thing as "untouched nature". Humans have been almost everywhere on the planet since the late 19th century (exploration of polar regions, deserts and submarines). There are hundreds of thousands of native Alaskans who have a problem with your idea that no one ever lived there.
True. But native Alaskans don't pave everything over with malls and parking lots.
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Also you can't have a rail line that goes on for thousands of miles without any maintanance stations, rest stops, etc... I'm worried that small towns will pop up along the route, as more trade occurs along the route the towns will grow and then the shit hits the fan from there.
