Just read a write up of a mass transit idea some one in Boston came up with. It's an elevated train, but the track is much less physically imposing than typical (Chicago "L") style. The supports almost look like the decorative arches in Uptown.
The guy's goal would be to replace all trains AND buses with this - basically any major road would have one of these lines over it. It could be partially funded by selling bus depots, transit centers, etc. He's quite vague on pricing though, and it is just a rough concept.
Wired article:
http://www.wired.com/2016/01/far-fetched-plan-for-mass-transit-is-intriguing-at-least/#slide-1
Design firm's website:
http://jacob-innovations.com/cTrain.html