Many decades and dozens of billions of taxpayer dollars were spent on designing and constructing the Big Dig. It was supposed to open up nearly 30 acres of prime downtown real-estate, and reunite the city. But when former environmental secretary John DeVillars approved the plan, he inserted an arbitrary stipulation that 75% of the land be used for "open space." Also: as it is constructed, the tunnel underneath will not support any building taller than a few stories. As a result, nearly all proposals for the land focused on different ways to turn it into a park, or worse, a parking lot. And in the end, what have we got for all of the effort? A six lane divided highway, at-grade, with "open space" in the middle. See for yourself:
$15 billion buys you a tunnel, a new at-grade highway and a glorified median strip
"Pedestrian friendly" connection to the North End
Northernmost section - perhaps the nicest part but still very highway-like
We didn't get redevelopment of the urban fabric to replace what was demolished fifty years ago. And we didn't get much of a park either. Just a barren "open space." Or as Charlie Gardner put it: they made a desert and called it a park.