What does a yellow traffic light indicate?

A yellow traffic light signifies that the light is about to turn red, indicating that drivers must prepare to stop. It serves as a warning that the signal is changing and encourages caution. When approaching a yellow light, drivers should not attempt to speed through the intersection but instead be ready to come to a complete stop if it is safe to do so. The purpose of this light is to prevent accidents and ensure the orderly flow of traffic as signals change.

While the other options suggest various actions like proceeding with caution or anticipating a green light, they do not accurately reflect the primary purpose of the yellow signal, which is to alert drivers to stop if possible.