What is a critical aspect to prevent interference while using radar units?

Keeping the radar units at a distance from one another is crucial to prevent interference because radar systems work by sending out and receiving radio waves. When two radar units operate in close proximity, their signals can overlap, leading to inaccurate readings or signal confusion. This is especially pertinent when both units are monitoring speed at the same time; they may inadvertently affect each other's performance.

Distance reduces the chance of mutual interference, ensuring that each radar unit can accurately detect the speed of the target vehicles without being influenced by signals or reflections from nearby radar units. This practice helps maintain the integrity and reliability of the data collected.

Other choices, such as using only one radar unit at a time or deploying units during low traffic times, may address specific scenarios but do not fundamentally tackle the root issue of signal interference as effectively as maintaining a proper distance between units. Utilizing advanced technology could enhance performance but wouldn't inherently prevent interference caused by physical proximity.