Safety Projective Lines / Projection

When we are driving in darkness such as night or cloudy days, our view is obstructed, the light from the car taillight isn't clearly and our safety can't be guarantee. So we designed the projective lines of safety driving distance. The driver can start it anytime he need by turning on the switch. It can check out his speed and figure out the safety distance. And then it can project three lines to call the driver of the car behind attention to him. The light is very clearly. If the driver can see the green line, it is safe, if he can only see the red line, it is very dangerous.