When a traffic light displays a stable (not flashing) yellow light:

1. It indicates that the flashing yellow light is about to appear. You should drive faster and clear the intersection immediately.
2. It indicates that the flashing green light is about to appear. You should drive faster and clear the intersection immediately.
3. Correct answer: It indicates that the red light is about to appear. You should prepare to stop or clear the intersection immediately.
4. It indicates that the stable (not flashing) green light is about to appear and you would be able to continue driving.

WhyA steady yellow means red is about to come on. Prepare to stop, and if you are already in the intersection, clear it.