Final answer:
A traffic signal is a type of road sign that regulates the flow of traffic at an intersection. In passing or crossing situations, it is important to respond to the signal and follow its instructions to ensure safety and avoid accidents.
Step-by-step explanation:
A traffic signal is a type of road sign that regulates the flow of traffic at an intersection. It uses signals such as red, yellow, and green lights to indicate when vehicles and pedestrians should stop or proceed. In passing or crossing situations, it is important to respond to the signal and follow its instructions to ensure safety and avoid accidents. For example, if the signal is displaying a red light, it means you must stop and wait for it to turn green before proceeding.