2011 Lexus LS 460 Owners Manual - Page 333

2-4. Using other driving systems LKA (Lane-Keeping Assist)∗ While driving on a freeway or motor highway that has lane markings, this system recognizes the lanes using a camera as a sensor to assist the driver with staying in the lane. The LKA system has two functions. n Lane departure warning function If the system judges that the vehicle may deviate from its lane, it alerts the driver using rapid beeping, indications on the multi-information display, and sensory warning* via the steering wheel. *: A slight steering torque is applied for a short period of time in the 2 direction of the center of the lane. n Lane keeping assist function This function will be active when vehicle-to-vehicle distance control mode of the cruise control (→P. 215) is set with vehicle speed above approximately 45 mph (72 km/h) while the lane departure warning function is active. When the lane keeping assist function is active, a slight steering torque will be applied, to help the driver maintain the vehicle in a central position within the lane. n Turning the LKA system on The lane departure warning function and lane keeping assist function will be activated depending on the recognition condition of lane markings, vehicle speed and the setting of radar cruise control (vehicle-to-vehicle distance control mode). Press the "LKA" switch to activate the system. Press the switch again to turn the LKA system off. When driving ∗: If equipped 237