Final answer:
You should follow the instructions of a police officer directing traffic, as they have the authority to manage traffic flow. Comply with their hand signals or commands, and if unsure, stop safely and wait for clarification. When approached by emergency vehicles like ambulances, pull over and allow them to pass for everyone's safety.
Step-by-step explanation:
When you see a police officer directing traffic, the appropriate action to take is to follow the officer's signals above all other traffic signals or signs. Police officers have the authority to override usual traffic rules to manage the flow of traffic more effectively and ensure the safety of all road users. Whether the officer uses hand signals or a whistle, it is imperative that you pay close attention and comply with their instructions. This demonstrates an understanding of the role of authority in maintaining order.
In scenarios where you're not certain what the officer is signaling, it is better to come to a complete stop at a safe distance and wait for a clearer instruction to avoid confusion or an accident. On the other hand, if an officer's request seems unreasonable or outside of their professional duties, such as asking you to do personal favors, you are within your rights to question such requests as beyond their scope of authority.
Remember, when you are driving and notice an emergency vehicle, like an ambulance, it's important to pull over to the side of the road and stop, allowing it to pass safely. Observing these rules helps ensure the safety of everyone on the road, including yourself and the individuals that emergency services are trying to reach.