Which of the following is a factor that can affect the accuracy of speed measurement devices?

• A. Type of fuel used in vehicles
• B. Distance from the measurement point
• C. Weather conditions
• D. Driver’s behavior during the stop

Answer: (C)

Weather conditions can significantly influence the accuracy of speed measurement devices. Adverse weather, such as rain, snow, fog, or strong winds, can affect not only the physical environment where the speed measurement is taking place, but also the performance of the device itself. For instance, rain can create visual obstructions or alter the signal of a radar used in speed measurement, while snow could reflect signals differently, potentially leading to erroneous readings.

In addition to this, certain electronic speed detection technologies may have trouble interpreting reflections or signals under specific weather conditions, which can further impact their accuracy. Therefore, understanding and accounting for weather conditions is critical for law enforcement and others using speed measuring devices to obtain reliable and accurate results.