What does a yellow traffic light indicate?

A yellow traffic light indicates that the signal is about to turn red, and drivers should prepare to stop if it is safe to do so. This warning allows motorists the opportunity to react appropriately, either by stopping or, if too close to the intersection, continuing through it with caution. It serves as a crucial transitional signal in traffic management, helping to prevent accidents that may occur if drivers do not expect an imminent stop. It is placed as a safety measure to alert drivers to the upcoming change in traffic control and encourages them to remain aware of their surroundings.