Which sensor detects the direction of vehicle travel?

The Magnetic Vehicle Detection Sensors (MVDS) are specifically designed to detect the presence and direction of metal objects, such as vehicles, as they pass over or adjacent to the sensors. This is accomplished by measuring changes in the magnetic field caused by the vehicle’s metal components. MVDS are commonly used in various traffic management systems to monitor vehicle flow and provide information about vehicle speed and travel direction, making them highly effective for border patrol operations where understanding vehicle movement is critical.

The other options, while they may have their specific functions, do not serve the primary purpose of detecting the direction of vehicle travel in the same manner. For example, remote video surveillance systems rely on cameras for visual monitoring, infrared devices detect heat signatures, and pressure pads sense weight but do not specifically identify vehicle direction. Thus, the MVDS is the most appropriate choice for this function.