What is a primary use of pressure pads in border operations?

The primary use of pressure pads in border operations is to detect movements on roads. These devices are designed to sense changes in pressure, which can indicate the presence of vehicles or individuals traversing a particular area. By placing pressure pads strategically along roads or pathways, border patrol agents can monitor traffic flow and identify potential illegal crossings or smuggling activities. This capability is crucial for enhancing surveillance efforts and maintaining security along borders.

In contrast, the other options do not align with the specific function of pressure pads. They are not used for tracking weather patterns, which typically relies on meteorological instruments. Monitoring air traffic requires different types of technology, such as radar systems designed for aerial surveillance. Providing communication signals is also outside the scope of pressure pads, as communication usually involves radios and satellite technology. Therefore, detecting movements on roads is the correct application for pressure pads in border operations.