Years ago we had,here in Boston,a highway project called "The Central Artery Project".When proposed by Rat politicians and their union thug pals it was projected to be about a billion dollars (IIRC).It turns out that it was at least 5 times that.
And in connection with it Congressman Barney Fag (also known as Barney Frank) made the one and only statement he ever made that I agree with.When commenting on the cost and the complexity of the project he said "it would be cheaper to raise the city than to lower the highway". It turns out he was right.
Amazing that the banking queen was ever right about anything.
Projected to cost $2B, IIRC. Instead, it cost $15B. The total expense will be $22B once the bonds are paid off.