Lane departure warning system is a special feature in some cars that helps you stay in your lane while you are driving on a road.
You know how we play a game where you try to walk on a line or rope without falling off? Well, imagine that the lane you are driving in is like a line or rope that you have to stay on.
Now, the car has a special camera or sensors that are watching the lane and can tell if you are about to drive off it. When this happens, the car will make a beeping noise or maybe even vibrate the steering wheel to warn you to stay in your lane.
The warning is like your mom or dad telling you to be careful when you are doing something that might hurt you. The lane departure warning system is like having an extra pair of eyes watching over you while you are driving so you can stay safe and not have an accident.