What does it mean if a traffic light is yellow?

Answer: B — Prepare to stop; the light is about to turn red

A yellow traffic light serves as a warning to drivers that the signal is about to change to red. This transition signifies that vehicles should be prepared to stop safely at the intersection. The intent is to allow enough time for drivers to react appropriately: some may need to slow down and stop, while others who are already close to the intersection may decide it is safer to proceed through before the light turns red. This understanding is essential for ensuring the safety of all road users, as it helps to minimize the risk of accidents that can occur if drivers do not heed the light’s warning. Recognizing the purpose of the yellow light contributes to a more orderly flow of traffic and reinforces safe driving habits.