What is the best way to warn drivers behind you that you are slowing down?

Tapping your brakes is the most effective method to warn drivers behind you that you are slowing down. When you tap your brakes, the brake lights on your vehicle illuminate, providing a clear visual signal to drivers following you. This immediate and direct communication alerts them to your intention to slow down, helping to prevent rear-end collisions and allowing them to adjust their speed accordingly. Brake lights are universally recognized as an indication that a vehicle is decelerating, making it a reliable way to convey this important information.

Using hazard lights or hand signals may not be as effective in this situation. Hazard lights indicate a potential issue or that you are stopped temporarily but do not specifically communicate that you are slowing down. Hand signals may not be easily visible or recognized by drivers, especially in poor visibility conditions. Drifting to the right lane could create confusion for drivers behind you and does not clearly indicate that you are reducing speed; it could instead imply you're changing lanes without communicating your deceleration. Therefore, tapping your brakes serves as the best and most straightforward warning to others on the road.