Nothing. CBP asks questions. The drivers refuse to answer. CBP gets their supervisor. One guy asks the supervisor for proof of his citizenship. All the drivers get waved through within a couple minutes.
They key appears to be not to pull to the side of the road for extended questioning, because as long as you're in the main lane, you're holding up traffic.
Comments
Nothing. CBP asks questions. The drivers refuse to answer. CBP gets their supervisor. One guy asks the supervisor for proof of his citizenship. All the drivers get waved through within a couple minutes.
They key appears to be not to pull to the side of the road for extended questioning, because as long as you're in the main lane, you're holding up traffic.