It's easy to recognize improper radar or lidar use by first understanding basic operational procedures. Learn about microwave and laser radar limitations, errors, and misinterpretation of readings resulting from improper use or a lack of understanding. Microwave and laser radars are precision instruments that accurately measure speed - when used properly, as designed. Design constraints limit how the radar or lidar should be located and used. Some police operate outside design limits unkwingly or to hide from motorist, resulting in unreliable readings easy to misinterpret. This book includes a basic description of microwave and laser radars, and their differences. Correct setup procedures are explained, and results when protocol is t followed. Results vary from speed errors to mis-identified vehicles. Many errors are predictable kwing just the general setup. Victims of microwave radar or laser radar (lidar), and police, will appreciate the easy to follow and understand information t found in radar or lidar user manuals or specifications.