Do you think they count the items he mentioned in the total costs?
Every major project in America has undocumented costs to go along with the miles of red tape. Just look at California's High Speed Rail.
Where I live they wanted to extend the expressway and it was overwhelmingly supported. So why, 6 years later hasn't it happened? The environmentalist sued to get a survey done that took 2 years to find.... no impact. The county commissioners got voted out and now the new ones want certain promises. The company that got the original no bid contract is owned by a brother of a former commissioner so that led to law suits. People sued because they don't want the new exits to be too close to their house. Others sued because they felt the exits would targets towards higher end homes and didn't equally consider everyone. Then you have the demands that we use ONLY AMERICAN LABOUR!!! and ONLY AMERICAN MATERIALS!!! A state representative said they would boycott the expansion unless a certain percentage of his constitutions were hired to do the work regardless of their qualifications. Another said they would block it due to road noise and complaints from his constitutions unless compensation was made.
It goes on and on and each one costs money they don't count in the official budget.