When you are at the point where you are building roads from hell like that maybe it is time to start looking at alternatives. It smells like a sunk cost fallacy in the works.
I see the article addresses something I saw firsthand. I remember they expanded rt 3 (a popular route to access rt 95/128 into Boston) because it was getting jammed during commutes. I said to myself "That will be jammed again in a few years". Sure enough, everyone moved to places fed by it and started switching to it and it was jammed up again.