In North Carolina, stationary RADAR instruments must be set up at what maximum angle to the target vehicle?

In North Carolina, stationary RADAR instruments should be set up at a maximum angle of 20 degrees to the target vehicle. This specification is critical because maintaining an angle within this limit helps to ensure the accuracy of the speed measurements recorded by the RADAR system. When the angle is too steep, the RADAR may produce inaccurate readings due to the geometric relationship between the RADAR waves and the target vehicle's speed. A 20-degree angle strikes a balance that allows the RADAR to function effectively while minimizing potential errors and ensuring reliable enforcement of speed limits.

Understanding the importance of the setup angle assists operators in maintaining the integrity of their readings and reinforces the legal validity of any citations issued based on those measurements. This accuracy is essential for law enforcement to uphold traffic laws fairly and effectively.