2011 Toyota Prius Owners Manual - Page 269

2 -4 . U sing ot he r driving syst e m s LK A (La ne -Ke e ping 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 multiinformation display, and a sensory warning* given via the steering wheel. 2 When driving *: A slight steering torque is applied for a short period of time in the direction of the center of the lane. n Lane keeping assist function This function will be active when the vehicle-to-vehicle distance control mode of the cruise control (→P. 221) is set with vehicle speed above approx. 50 mph (approx. 75 km/h) and 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 inside the lane. ∗: If equipped 243 PRIUS_U (OM47685U) DVD