How must a driver signal their intention to stop?

The correct response highlights the importance of using both brake lights and turn signals to communicate a driver's intention to stop. When a driver applies the brakes, the brake lights automatically illuminate to alert vehicles behind them that they are slowing down. This is critical for maintaining safety on the road as it provides a clear and immediate visual signal to other drivers. Additionally, using turn signals enhances this communication by indicating the driver's next intended movement or action, helping to prevent accidents and misinterpretations of their intentions.

In contrast, relying solely on honking the horn, raising a hand out the window, or flashing headlights does not provide a standardized and universally understood warning to other drivers about an upcoming stop. These methods may not be as effective or visible, especially in busy traffic or during low visibility conditions. Therefore, using brake lights and turn signals is the most appropriate and recognized way to signal a stopping intention, ensuring a safer driving environment for everyone on the road.