Final answer:
A flashing traffic signal that is yellow is similar to a caution or warning sign. It indicates that drivers should slow down and be prepared to stop if necessary.
Step-by-step explanation:
A flashing traffic signal that is yellow is similar to a caution sign or a warning sign. It is meant to indicate that drivers should slow down and prepare to stop if necessary. In social studies, traffic signals and road signs are often studied as part of transportation and urban planning topics.