US Patent 7280902 Vehicle deceleration control apparatus

If a driver of a vehicle has slowed-down the vehicle, a deceleration controller does not apply deceleration to the vehicle within a specified time after the driver has finished slowing-down of the vehicle. The deceleration controller is a device that automatically decelerates the vehicle if a distance between the vehicle and another vehicle running in front of the vehicle is less than a specific distance to avoid collision of the two vehicles.