Are you seriously proposing the "Big Dig" as a model for the country? The highways are still there at the center of things, just out of sight. And they did this at enormous cost to the rest of us. This is a classic example of having one's cake and eating it too. The nation can't afford any more of these boondoggles IMO, and it seems to me to be a cautionary tale of how not to plan a transportation system.