Rear-end collisions are the most common type of collision between two motor vehicles. This accelerometer-responsive brake light will reduce the number and the severity of rear-end collisions on the road. design is implemented as a third brake light, consisting of several columns of super-bright red light emitting diodes (LEDs) which illuminate relative to the acceleration of the vehicle. The system consists of the accelerometer, the microcontroller and the display. The acceleration of the car is relayed to the microcontroller, which then determines how many columns of LEDs to illuminate. This warning is then received by following cars providing additional reaction time, helping to avoid an accident."
please explain me the basic idea behind this so that i can work on it?