We are doing a trip around New England in September and would like to ask a question regarding toll roads and payments.Our travel agent in the UK doesn't have any experience on the subject but did mention a transponder. What actually is a transponder and how does it work. Do the payments get recorded via number plate recognition. Does the transponder work in all the states for our whole trip. Our route will be; Arrive at Boston, pick up hire car(already booked), down to Falmouth, across to Newport, up to Lee, Middlebury, across to North Conway, Bar Harbor and then down to Boothbay Harbor, Portsmouth and finally to Boston, unload baggage at hotel and then drop car off at airport.
Here in the UK we can get around without using tolls so this will be something new for us. Any information will be greatly appreciated