Checkpoints are designated locations where vehicles or individuals are stopped for inspection. They are commonly used by law enforcement or security personnel to ensure compliance with laws and regulations. Checkpoints can be set up for various purposes, such as checking for drunk driving, verifying immigration status, or conducting security screenings. In addition to law enforcement, checkpoints can also be used in other contexts, such as during military operations or at border crossings. They serve to enhance safety and security by allowing authorities to monitor and control the movement of people and goods in specific areas.