Yes, one could even argue evacuated tube trains with maglev are the most efficient for of transportation. Believe it or not, this was known 5 years ago -- you

Yes, one could even argue evacuated tube trains with maglev are the most efficient for of transportation. Believe it or not, this was known 5 years ago -- you can find it on old documentaries, where they talk about it with conviction this was the future of transportation. The problem is simply the early investment. The tech is here. With our current pace of innovation, a pharaonic transportation project with recoup costs on the order of a century is hard to justify. The need to physically displace yourself is changing rapidly with the internet, and who knows what we'll need in 100 years!