LANE DEPARTURE WARNING AND LANE KEEPING ASSIST
If your attention wanders and your vehicle starts to drift out of the lane, a lane departure system warns you with a beep, vibration or visual cue on the instrument panel.
If the vehicle also is equipped with lane keeping assist, it will go beyond just a warning: It will make a minor steering or braking correction to keep the car in its lane. Common names for these systems are LaneSense (Chrysler), Active Lane Keeping Assist (Mercedes-Benz) and Lane Departure Alert with Steering Assist (Toyota). NHTSA recommends lane departure warning but does not yet recommend lane keeping assist.