Just wanted to share our experience:
yesterday we were driving in a middle of Vermont and there was a USCIS roadblock on the highway. They stopped all cars and asked if occupants were US citizens. If not one needed to show proof of immigration status. We went skiing and all three of us in the car (permanent residents) had no green cards. I had a copy. They pulled us over, run our drivers licences in their computer and let us go. The guy was very nice, he said, you know you need to carry your cards at all times, but no problem, we understand people often don't do it, we just need to make sure we can see you in our system... I felt so lucky they let us go without a ticket.
Just a warning...
Nick
yesterday we were driving in a middle of Vermont and there was a USCIS roadblock on the highway. They stopped all cars and asked if occupants were US citizens. If not one needed to show proof of immigration status. We went skiing and all three of us in the car (permanent residents) had no green cards. I had a copy. They pulled us over, run our drivers licences in their computer and let us go. The guy was very nice, he said, you know you need to carry your cards at all times, but no problem, we understand people often don't do it, we just need to make sure we can see you in our system... I felt so lucky they let us go without a ticket.
Just a warning...
Nick