When should follow-up speed checks be conducted by an officer?

The correct choice emphasizes the importance of conducting follow-up speed checks when a vehicle is suspected of speeding and before initiating a traffic stop. This approach allows the officer to gather additional evidence of the vehicle's speed, ensuring that any actions taken are justified and based on accurate assessments. Follow-up checks can confirm the initial readings and provide a clearer context for the officer's observations, which is crucial for establishing probable cause for the stop.

By verifying the speed again before taking action, officers can mitigate the risk of errors that could occur due to equipment malfunction or other factors. This practice aids in reinforcing the credibility of the enforcement action while aligning with proper procedural conduct. Conducting follow-up speed checks in this situation ensures that officers make informed decisions based on reliable data, which is central to effective law enforcement.

While other situations might seem relevant, they do not emphasize the critical nature of verifying suspected speed before taking the next step of initiating a traffic stop.