"Only 98%? Who paid the other 2%?"
Contentious, aren't we. The other 2% was existing toll roads, that were allowed to join the Interstate system.
Now here's a question for you - name a toll road that, in the past 20 years, became a freeway.
Connecticut Turnpike--was that within the past 20 years?
The western several exits of the Mass Pike were made free in the 1990s by Bill Weld, who recognized that people in the rural Berkshires didn't need to pay for a metropolitan area highway.