Thanks for shedding more light on this operation, Mogger. It certainly helps to have FReepers who are more familiar with the topic at hand. Much appreciated.
You're welcome.
It was almost half way through my daily 113.5 miles daily commute.
For those of us who knew, we could get off at the previous exit, bypass it on NH route 3, which is right beside I-93, and hop back on at the next exit.
I never bothered as they were very efficient.
I was never delayed more than a minute.
They just asked if you were a US citizen. No "showing of papers" or ID check.
A few seconds and you were on your way.
They were basically looking for Canadian felons, or ones who had been arrested in the USA.
Bike week can get a little wild.