After some Googling, it appears that the U.S. land border crossing points are less monitored. I've only utilized U.S. air and sea crossings, both of which do ha

After some Googling, it appears that the U.S. land border crossing points are less monitored. I've only utilized U.S. air and sea crossings, both of which do have electronic exit visas (because the shipline or airline reports their passenger manifest to the authorities). So, yes, no check is done when using a land crossing.