Final answer:
When encountering slow-moving vehicles, it is important to be patient and pass with care. For emergency vehicles with sirens, you should pull over to allow them to pass safely. Always prioritize safety and follow traffic laws to ensure the well-being of all road users.
Step-by-step explanation:
Encountering Slow-Moving Vehicles
When encountering slow-moving vehicles, the appropriate action to take is to be patient and pass with care. Tailgating or sounding your horn, like Peter did when he got stuck behind a slower driver, are not safe or respectful practices. Instead, follow at a safe distance and pass when it is legal and safe to do so without speeding. Similarly, while driving alongside a train and experiencing a change in the train's horn pitch due to the Doppler effect, it's important to focus on maintaining a safe speed rather than attempting to match the speed of the train. In any driving situation, safety should always be the primary concern.
In regards to emergency vehicles, when you hear a siren, it's crucial to determine the direction and pull over to allow the ambulance to pass. This is the law in many places and a matter of public safety. The Doppler effect can give cues about the ambulance's location with respect to you, but the main action is to clear the way.
Lastly, traffic signals are implemented in areas with excessive speeding to enforce a reduction in speed and improve the overall safety of intersections for all individuals including pedestrians, such as the woman with a baby stroller or a dog running into the street.