If you need to slow down or stop when other drivers may not expect it, you should ______.

When you need to slow down or stop unexpectedly, quickly tapping your brake pedal a few times serves as a signal to the drivers behind you that you are reducing speed. This technique allows you to communicate your intention without the use of turn signals and helps alert other drivers, reducing the likelihood of a rear-end collision. It provides a clear visual cue that you are slowing down, distinguishing your actions from normal driving.

While using hazard lights is an option for signaling a stop, it's typically reserved for emergencies and could create confusion if used in non-emergency situations. Accelerating to prevent confusion is counterproductive and could lead to dangerous situations. Lastly, waiting until the road is clear may not be practical or safe in situations where immediate action is required. Thus, tapping the brake pedal is the most effective and safe way to alert other drivers of a change in your speed.