I don't think it is for the tunnel alone. I think it is for all of the other work like a transit yard, more train carts, better train communication, more maint

I don't think it is for the tunnel alone. I think it is for all of the other work like a transit yard, more train carts, better train communication, more maintenance faciliities, etc, that boosted the price to $16b. > NYC area construction costs are out of control relative to most of the developed world. Being in NYC construction and design, the problem currently is the availability of contractors and workers. The prices follow the law of supply and demand. And a huge amount of public sector work (billions of dollars) is hitting the region and more is projected in the future. Just yesterday I learned that recent construction bid prices for projects were coming in much, much higher than the engineer's estimate throughout the City. In contractor's words, times are good, so bid high.