Which of the following affects the accuracy of RADAR readings?

The accuracy of RADAR readings is influenced by multiple factors, making the choice that encompasses all of them the correct answer. Each element mentioned significantly impacts how radar detects and interprets speed.

The speed of traffic in the opposite direction can result in Doppler shift effects, potentially skewing the readings depending on how RADAR is set up and how it interprets the return signal. Environmental factors, such as weather conditions, including rain, fog, or snow, can affect the transmission of radar signals, leading to inaccuracies or reflections that complicate speed readings. Additionally, the amount of traffic on the road can create interference, as multiple vehicles may reflect the radar signal, causing confusion that can distort the detected speeds.

Since each of these components contributes to the overall effectiveness of radar technology in measuring vehicle speeds, the most comprehensive answer acknowledges that all these factors collectively impact accuracy.