Burying the interstate along the waterfront makes sense. As you say, one question is, how many cities can afford to dump the ports and make their waterfronts into yuppie theme parks?
Also, how much of the tab are my federal taxes going to pick up, even though I don't expect ever to visit Philadelphia again?
Having lived in Cmbridge MA for much of the past decade (have since moved) I like the idea of the freeway being buried underground, and the proposed rail link between North and South stations It was a dumb idea to cut Boston up like that with some ugly a$$ freeway when they built it in the 1950's. The question is, who should pay and how should it be managed.