In radar speed detection, what does 'target signature' refer to?

The concept of 'target signature' in radar speed detection refers to the unique characteristics of a vehicle's reflected radar signal. When radar waves are emitted and hit a moving vehicle, they bounce back to the radar unit. The way these signals are reflected can be influenced by various factors, including the vehicle's size, shape, and material. Each vehicle has different reflective properties that create a distinct profile or signature, allowing radar systems to identify and differentiate between various vehicles even when multiple targets are present.

This understanding of 'target signature' is crucial for accurately measuring a vehicle's speed and ensuring that the readings are reliable and specific to the vehicle in question. Other options, such as the vehicle's registration number, color, or make, do not pertain to the technical aspects involved in radar speed detection and the interpretation of radar signals.