Lexus LS460 2011 Owner's Manual page 383

CAUTION

Cautions regarding the assist contents of the system
By means of alarms and brake control, the pre-crash safety system is
intended to assist the driver in avoiding collisions through the process of
LOOK-JUDGE-ACT. There are limits to the degree of assistance the system
can provide, so please keep in mind the following important points.

Assisting the driver in watching the road
The pre-crash safety system is only able to detect obstacles directly in
front of the vehicle, and only within a limited range. It is not a mechanism
that allows careless or inattentive driving, and it is not a system that can
assist the driver in low-visibility conditions. It is still necessary for the
driver to pay close attention to the vehicle's surroundings.

Assisting the driver in making correct judgment
When attempting to estimate the likelihood of a collision, the only data
available to the pre-crash safety system is that from obstacles it has
detected directly in front of the vehicle. Therefore, it is absolutely neces-
sary for the driver to remain vigilant and to determine whether or not there
is a possibility of collision in any given situation.

Assisting the driver in taking action
The pre-crash braking is designed to help reduce the severity of a colli-
sion, and so only acts when the system has judged that a collision is
unavoidable. This system by itself is not capable of automatically avoid-
ing a collision or bringing the vehicle to a stop safely. For this reason,
when encountering a dangerous situation the driver must take direct and
immediate action in order to ensure the safety of all involved.
LS460_EE
2-4. Using other driving systems
2
367