Years ago I lived in W. Orange NJ. I think Reagan was in the WH but whoever it was, someone who rated secret service protection lived or visited near us. So from time to time we'd run into some state or local police roadblocks when trying to get home.
Anyway, one afternoon we found our exit blockaded by a couple of local officers. We knew from previous experience not to bother to ask what was going on because they wouldn't say anything. Then it started to rain and rain hard, but these guys had to stay out in it, blocking the exit until somebody passed by. They were not happy and probably didn't have clue what was going on either. This went on for 10 minutes. No car or motorcade ever came as is often the case in these operations - another route was taken. Then after a little radio chatter the two soaked officers got in there car and headed for a local bar I'm guessing. I really felt bad for them.
Highway patrol work looks like it sucks except when it's dangerous.