If it makes you feel better, the massive expansion and buildings of transportation and construction is biting China in the ass now with its slowing economy. They can no longer simply build their way into keeping a high economic growth, and the painful changes of moving from a manufacturing economy to a consumption economy will be laid bare.
Such an ambitious transportation system in the U.S. would be the story of dreams, though.
Well China built vast blocks of buildings that would never sell to boost their economy. There's also other complications that no other nation faces while expanding infrastructure.