What is the primary function of a "Border Patrol checkpoint"?

The primary function of a Border Patrol checkpoint is to check for illegal immigrants and contraband. These checkpoints are strategically located on roads leading away from the border, allowing agents to screen vehicles for unauthorized persons attempting to enter the country illegally. Moreover, these checkpoints serve to interdict smuggling activities that may involve drugs, weapons, or other illegal goods.

While monitoring vehicle speed, collecting taxes on goods, and providing information to travelers may be associated with other types of law enforcement or border activities, they are not the core purpose of Border Patrol checkpoints. The checkpoints focus specifically on immigration enforcement and the prevention of illegal cross-border activities, making them vital to national security and border integrity.