When should officers retest and calibrate their speed measurement devices?

• A. Only once a year
• B. After any incidents that may affect calibration or accuracy
• C. Before every patrol shift
• D. After every traffic stop

Answer: (B)

Retesting and calibrating speed measurement devices after any incidents that may affect calibration or accuracy is essential for ensuring the reliability of the device. Factors such as physical impacts, environmental conditions, or changes to the device’s settings can compromise its accuracy. Performing retests and recalibrations after such incidents helps to maintain the integrity of speed readings, which is vital for enforcement actions and legal proceedings.

Regular calibration, as stipulated in option B, ensures that the device operates within the expected tolerances and can be trusted to provide accurate speed measurements. This practice is also aligned with many law enforcement protocols that prioritize the accuracy of evidence collected during traffic enforcement. By following this guideline, officers can confidently rely on the device's information when making determinations of speed violations.