Final answer:
Stop your vehicle when a police officer signals you to do so, even if the traffic light is green, as the officer's instructions take precedence for everyone's safety.
Step-by-step explanation:
When you encounter a situation where a police officer is signaling you to stop at a green light, it is crucial to adhere to their instructions over the traffic light. Safety and compliance with law enforcement are paramount in these scenarios. You should immediately slow down and pull over to a complete stop in a safe manner, despite the green light. The officer's directions take precedence over traffic signals because they might be responding to an emergency or directing traffic to prevent an accident. Ignorance of their commands can lead to dangerous situations and legal repercussions. Remember, the primary concern is the safety of all road users, including yourself, the police officer, and other pedestrians and drivers.