adaptive brake lights 
It's safer to know just how hard that car in front of you is braking, especially when you're distracted. Adaptive brake lights increase the intensity of stop lamps depending on how hard the driver presses the brake pedal. In other systems, when the driver applies the brakes hard, or upon activation of the ABS, the rear taillights join the brake lights at the same intensity to warn the vehicles behind that hard braking is taking place.

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