Do you think the total car traffic in the Boston area today is greater than it would have been had the Big Dig not been built? If yes, the ‘infrastructure naysayers’ were correct.
It’s probably gone down, actually, at least in per capita terms. Boston’s population is a lot bigger than it used to be, so that has to be taken into account.
Keep in mind, the Big Dig actually reduced the total number of highway ramps, which is part of why it increased traffic flow. And by reclaiming neighborhoods from elevated highways, it reconnected areas. You can easily walk places that were not possible before.
But they still deepen the overall car dependency. Investing in rail-bound transportation while imposing heavy fees on car traffic into the city would likely be a better use of resources.
Boston is far from car dependent; it’s probably one of the worst cities in America for drivers, and best for cyclists and pedestrians.