Lta (Lane Tracing Assist); Lane Departure Alert Function - Lexus LS500 Owner's Manual

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4-5. Using the driving support systems

LTA (Lane Tracing Assist)

*
: If equipped
When driving on highways and
freeways with white or yellow lines,
this function alerts the driver when
the vehicle might depart from its
lane and provides assistance by
operating the steering wheel to
keep the vehicle in its lane. Further-
more, the system also provides
steering assistance when dynamic
radar cruise control with full-speed
range is operating to keep the vehi-
cle in its lane.
The LTA system recognizes white or
yellow lane lines using a camera
sensor. Additionally, it detects pre-
ceding and surrounding vehicles
using the camera sensor and front
radar sensor.
LS500h_OM_OM50F42U_(U)
*
WARNING
Before using LTA system
■
Do not rely solely upon the LTA system.
The LTA system does not automatically
drive the vehicle or reduce the amount of
attention that must be paid to the area in
front of the vehicle. The driver must
always assume full responsibility for driv-
ing safely by paying careful attention to
the surrounding conditions and operat-
ing the steering wheel to correct the path
of the vehicle. Also, the driver must take
adequate breaks when fatigued, such as
from driving for a long period of time.
Failure to perform appropriate driving
operations and pay careful attention may
lead to an accident, resulting in death or
serious injury.
■ To avoid operating LTA system by mis-
take
When not using the LTA system, use the
LTA switch to turn the system off.
Functions included in LTA system

Lane departure alert function

■
When the system determines that the
vehicle might depart from its lane or
*
course , a warning is displayed on the
multi-information display, and either a
warning buzzer will sound or the steer-
ing wheel will vibrate to alert the driver.
*
: Boundary between asphalt and the side
of the road, such as grass, soil, or a curb
When the warning buzzer sounds or
the steering wheel vibrates, check the
area around your vehicle and carefully
operate the steering wheel to move the
vehicle back to the center of the lane.
When the system determines that the
vehicle might depart from its lane and
that the possibility of a collision with an