What is a recommended way to warn other drivers that you are slowing down?

Tapping your brake pedals a few times serves as an effective way to alert other drivers that you are slowing down. This action illuminates the brake lights, which are designed to indicate to following vehicles that you are decelerating. It provides a visual cue that is easily recognizable on the road and gives drivers behind you the opportunity to adjust their speed and maintain a safe following distance.

While other options may be used in various driving situations, they do not effectively communicate your intention to slow down. Flashing headlights may confuse other drivers or signify different messages, while using your horn continuously could be perceived as aggressive rather than informative. Signaling with your turn signal is specifically meant for indicating a turn or lane change, not for slowing down, making it less appropriate for this context. Therefore, tapping your brake pedals is the most recommended choice for warning other drivers about your deceleration.