Lexus LS460 2011 Owner's Manual page 277

CAUTION

Before using adaptive cruise control with full-speed range
Do not overly rely on vehicle-to-vehicle distance control.
Be aware of the set vehicle speed. If automatic deceleration/acceleration is
not appropriate, adjust the vehicle speed, as well as the distance between
your vehicle and vehicles ahead by applying the brakes etc.

To avoid inadvertent adaptive cruise control with full-speed range activation
Switch the cruise control off using the "ON-OFF" button when not in use.

Situations unsuitable for adaptive cruise control with full-speed range
Do not use adaptive cruise control with full-speed range in any of the fol-
lowing situations.
Doing so may result in inappropriate speed control and could cause an acci-
dent resulting in death or serious injury.

In heavy traffic

On roads with sharp bends

On winding roads

On slippery roads, such as those covered with rain, ice or snow

On steep downhills, or where there are sudden changes between sharp up
and down gradients

At entrances to expressways

When weather conditions are bad enough that they may prevent the sen-
sors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
Vehicle speed may exceed the set speed when driving down a steep hill.

When an approach warning buzzer is heard often
LS460_EE
2-4. Using other driving systems
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