I hate to tell you this, but in the People’s Republic of New Jersey, and a few other places, I believe, the seatbelt laws have been upgraded to a primary offense...in other words, a cop can pull you over if he sees you driving without the belt, no other infraction is necessary.
Texas does the same thing. I got snagged when a highway patrol officer drove past me and saw I wasn’t wearing a seatbelt. Wasn’t doing anything otherwise. That was two years ago and it cost me $180 then. No telling how much it is now.