Gary and Kathy, we toured the northeast in 2011 going from TN all the up to Maine. I'm sure that there is a map of some sort that will show where the low bridges are located. Twice, we came up to low bridges and had to work our way around. Not a big problem but one in Pennsylvania was listed at 12' and we were 12'11".
So, I pulled over just before the bridge so that we could check our maps. We really couldn't figure it out so we called the local Police dept. They couldn't have been nicer and most helpful. The officer told us it was a good thing that we were on the side that we were as on the other side of the bridge, there would not have been a place to pull over. Makes for a good adventure I guess.
He told us of times when truck driver's don't pay attention and will drive right under the bridge peeling their trailer roofs back. One time there were chickens flying everywhere! LOL!
We also want to go up to Nova Scotia so I will be watching this thread.
Safe travels,
MM.