They do stop them there for weight and other vehicle code checks, but I was refering to a speed issue.
Do they still have that huge sign with the Mexican woman and 3 trailing kids in tow just a couple of miles before the checkpoint? Is this because some vehicles full of aliens have second thoughts about trying to fake their way across and they dump them on the side of the road?
No, it’s because people sometimes try to cross the freeway. Think of it like the Deer signs.