A device and system for indicating rapid deceleration to warn the operator and/or
others of an urgent deceleration condition is provided. The device includes one
or more sensors that are responsive to acceleration in the primary direction of
vehicle motion. The controller communicates with the one or more sensors, corrects
for gravitational effects, and initiates at least one warning indicator when the
sensed acceleration exceeds a threshold value and thereby indicates an urgent deceleration condition.
