What is essential for SMDs to function effectively?

What is essential for SMDs to function effectively?

• A. They must be expensive
• B. They must be operated by trained personnel
• C. They should only be mobile
• D. There should be no speed limit signs

Answer: (B)

For speed measurement devices (SMDs) to function effectively, it is crucial that they are operated by trained personnel. Proper training ensures that the operators understand the technical aspects of the device, including how to calibrate it, interpret its readings, and adhere to legal standards during enforcement. Well-trained personnel can also accurately document conditions that might affect speed readings, such as weather, traffic conditions, and road types, which contributes to the reliability and legality of the evidence gathered.

Other options may present characteristics that are not fundamental to the functionality of SMDs. For instance, while expense may correlate with quality, it is not a requirement for effective operation. Similarly, SMDs can be fixed or mobile; both types can operate effectively when used properly. Lastly, speed limit signs are separate from the operation of SMDs; while they provide context for enforcement, they do not impact the device's ability to measure speed. Thus, focused training for operators is the key factor in ensuring SMDs function correctly and yield valid results.