What action should be taken when the traffic signal turns yellow?

When the traffic signal turns yellow, the appropriate action is to prepare to stop. The yellow light serves as a warning that the signal is about to change to red, indicating that drivers should begin to reduce speed and stop safely if they can do so. This action is crucial for ensuring the safety of both the driver and other road users, as it helps prevent potential collisions that could occur if a driver tries to rush through the intersection.

The yellow light allows sufficient time for vehicles that are already in the intersection to clear it, while also giving those approaching the red light the opportunity to stop safely without abrupt braking or panic. This practice is fundamental for the coordination of traffic flows and the prevention of accidents in intersections. Engaging in this response helps maintain a safe environment for all road users, reinforcing the importance of following traffic signals and rules.