Always on the right track.

Lane Departure Warning in the BMW 7 Series Sedan.

The camera installed near the interior mirror on the windscreen monitors road markings and their position versus the car as well as the edge of the road or lane. The system is activated whenever the vehicle leaves its current lane unintentionally and alerts the driver by making the steering wheel vibrate. When the driver indicates their intention to change the lane by using the indicator, there is no warning signal.