As someone who works a block from the big dig, I can say that street traffic is generally not an issue. People generally use the big dig to commute through Bos

As someone who works a block from the big dig, I can say that street traffic is generally not an issue. People generally use the big dig to commute through Boston, or to get to the airport, not to get downtown. (There's not much downtown for tourists!) Those in the suburbs (of which I was one) drive to train/subway stations on the outskirts and take those in. You'd be an absolute fool to try to drive into the mess of one-way streets that is downtown Boston unless you have a really good reason.