What action is most effective when approaching a yellow traffic light?

When approaching a yellow traffic light, the most effective action is to prepare to stop safely. A yellow light indicates that the traffic signal is about to turn red, signaling drivers to clear the intersection or prepare to halt. The key is to assess your stopping distance and the traffic conditions. Slowing down prepares you for a safe stop and ensures that you are not caught in an intersection when the light turns red, which could lead to a potential accident.

This approach allows for a safe transition as the light changes and keeps the flow of traffic manageable. It's important to remember that the intention of the yellow light is to warn drivers to get ready to stop, rather than to speed up or maintain speed.