Quote:
Originally Posted by donquixote99
Why so much? Expensive land?
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I suppose that's part of it, at least in the built up area around Tyson's Corner. From there out to Dulles though, they already had the right-of-way secured in the median of the toll road leading to the airport. And this project took the less expensive option of building a tunnel under the Tyson's Corner area. It could have been considerably more expensive.