Boston has successfully moved one highway underground (the big dig) and shot down an extension of I-95 (there are parks and a train route where it was planned now). The city is much better for it.
We're actually going in reverse. In the next 2 years a horrible little spur of elevated highway that cuts through Somerville (McGrath) is getting demolished and replaced with a nice boulevard. That whole area is just blighted at the moment. It's going to become some of the nicest housing with parks and shops.
And I am so grateful for that.