David W. Dunlap | The New York Times

BOSTON — The federal government this week pledged nearly $1 billion to help finance the expansion of the Massachussets Bay Area Transportation Authority's (MBTA) Green Line from Cambridge into Somerville and Medford, a major boost for the long-promised transit project, The Boston Globe reported.With its long steel wings poised sinuously above the National September 11 Memorial in Lower Manhattan, the World Trade Center Transportation Hub has finally assumed its full astonishing form, more than a decade after it was conceived.

Its colossal avian presence may yet guarantee the hub a place in the pantheon of civic design in New York. But it cannot escape another, more ignominious distinction as one of the most expensive and most delayed train stations ever built.

The price tag is approaching $4 billion, almost twice the estimate when plans were unveiled in 2004. Administrative costs alone — construction management, supervision, inspection, monitoring and documentation, among other items — exceed $655 million.

Even the Port Authority of New York and New Jersey, which is developing and building the hub, conceded that it would have made other choices had it known 10 years ago what it knows now.

“We would not today prioritize spending $3.7 billion on the transit hub over other significant infrastructure needs,” Patrick J. Foye, the authority’s executive director, said in October. Read more