This is the High Line prior to hordes of tourists. It's always a pleasure to find unequivocal moments of successful architecture. But, to quote Yogi Berra: "No one goes there anymore, it's too crowded."
Some people have suggested that Boston could have done this with the elevated section of I-93 as part of the Big Dig project. The scale is different and the surrounding architecture is different, so it would not have worked as well.