Final answer:
An authority figure such as a police officer or emergency vehicle personnel can overrule the traffic light in the event of heavy traffic or an emergency.
Step-by-step explanation:
In the event of heavy traffic or in an emergency, an authority figure can overrule the traffic light. This is typically done by a police officer or emergency vehicle personnel. They have the authority to direct traffic and make decisions based on the situation at hand.For example, if there is heavy traffic and a police officer determines that it is necessary to keep traffic flowing in a certain direction, they can manually control the traffic lights to do so. Similarly, during an emergency, emergency vehicles can override the traffic lights to ensure a swift and safe passage.