B60Q 1/447

Arrangements or adaptations of optical signalling or lighting devices the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, {e.g. by detection of the foot approaching the brake pedal controlled by inertial devices with indication of the braking strength or speed changes, e.g. by changing the shape or intensity of the indication}