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. 當駕駛者無意間讓車輛偏離目前的車道(亦即沒有打方向燈)時，車道偏離警示系統時就會啟動。 當車速高於70km/h時，系統就會發揮作用，並和車道變換警示系統一樣，以震動方向盤的方式向駕駛者示警。本技術利用道路標示辨識車道，但如沒有標示，則會以道路的邊緣為標準。
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