Yes, I know of the Agricultural stations at the Florida boarder (I see them every time I drive to Florida).
But they are just for commercial vehicles and anything in tow to prevent invasive species coming into the state. I understand that ... their industry could be devastated if some insect or fruit/vegie rot got in there.
Are we to expect to see these Check Point Carlie’s poping up at every state boarder?
The California ones stopped every vehicle on the road, not just commercial vehicles.