And occasionally somebody proposes a space elevator too (which, based on current technologies, is only slightly more infeasible.)
The economic benefits of such a road would be minimal. Seriously, somehow transporting goods from Russia to the US via truck, (but only during the parts of the year when the road isn't blocked due to snow) is supposed to make sense, when we have perfectly good trains and container ships that can do the job just as quickly for far less money?
This makes the fanciful "Hyperloop" project look like a cost-effective means of transportation in comparison. That takes talent.