5. Texas Central Railway (Texas)
Estimated Cost: $10 billion
Like the previous Dulles one, the much-awaited Texas Central Railway is still in the planning stage. It isn’t only popular for the budget it has, but is also ideal for its potential improvements on getting around Texas. It has also been the subject of a few controversies, which has only made it more popular in a sense. The project, which spans 240 miles, is sure to be a great help to everyone in Texas, which is why it makes our list of biggest construction projects in U.S.
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