Good question, I would like to know the answer myself. I have always paid the tolls while passing through New England, that is where there are toll booths that are attended. Now there is a place on the Mass Pike that removed their toll booths last Oct-Nov time period and installed cameras. When we went to Florida last Dec I had to fine a way around the toll, that involved going on country roads and towns. I did contact the Mass Pike authority before we left home and all they would tell me was to get an E-Z Pass or drive through and they would bill me, I would have 30 days to pay the bill. I have talked to other Canadians who said they drove through and haven't received a bill yet. I sure would like to know before we go south again the fall.