Originally Posted by
HkCaGu
Please don’t quote this junk map. It may be theoretical, but in practice CBP does not have secondary checkpoints based on the coasts. Only the northern and southern border zones. There are no checkpoints going from L.A. to Las Vegas, nor questioning at SEA, SFO or LAX going inland.
Maybe they don't have permanent checkpoints, like on I-5 in California, but Boarder Patrol has questioned people in Florida and other coastal areas not near the MX or CA borders.