A proposal for a Chicago--Columbus--Pittsburgh "hyperloop" is among 35 semifinalists in a global competition:
http://www.post-gazette.com/news/tra...s/201701110085
This is a sort of technology (magnetic propulsion in near-vacuum tubes) that has long been talked about, because from a pure physics standpoint the merits are obvious. The question is whether it can be made to work in practice.
Edit:
Some more resources if people are interested:
http://abc6onyourside.com/news/local...ine-to-chicago
http://venturebeat.com/2017/01/10/hy...r-hour-trains/