What does this traffic light indicate?

• Drivers must proceed with caution and be prepared to stop.
• Drivers should speed up and pass through the intersection quickly.
• Drivers must come to a complete stop immediately.
• Drivers should prepare to stop as the light is about to turn red.
  Explanation:

  "A solid yellow traffic light means "caution" or "prepare to stop." When drivers see a solid yellow light, it indicates that the signal is about to change from green to red. Drivers should slow down and be prepared to come to a stop if it is safe to do so before the intersection."