TOYOTA 2011 Prius - Manual (Page 269)

243
2-4. Using other driving systems
2
When
d
riving
PRIUS_U (OM47685U) DVD
LKA (Lane-Keeping Assist) ∗
∗
: If equipped
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 a sensory warning
* given via the steer-
ing wheel.
* : 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 keep-
ing assist function is active, a slight steering torque will be
applied, to help the driver maintain the vehicle inside the lane.