Lexus 2003 LS Owner's Manual page 428

r Cautions
Y Do not rely too much on dynamic laser cruise control. Vehicle–to–vehicle distance control has its limitations.
Always remain aware of the distance from the vehicle ahead and other vehicles. If necessary, depress the brake pedal to ensure
sufficient distance.
Y Dynamic laser cruise control is not a collision–avoidance system.
If necessary, depress the brake pedal to ensure sufficient distance.
Y Dynamic laser cruise control should not be used in the following conditions:
R In bad weather (such as rain, fog, snow, sandstorms)
R In direct sunlight from the front
R Raindrops or snowflakes get in the laser radar sensor glass.
R On the roads in heavy traffic or at sharp bends
R On slippery road surfaces (icy or snow–covered road surfaces)
R On steep downhill slopes
R Acceleration or deceleration must be repeated.
R On roads with steep and short inclines and declines
In any conditions of the above, an appropriate vehicle–to–vehicle distance control
may not be attained.
Y This system is not provided to justify careless driving.
Always remain aware of the distance from the vehicle ahead and other vehicles.
Y The dynamic laser cruise control should not be used when exiting from,
or when entering or merging onto a freeway.
When you are following a slower moving vehicle and exiting, the sensor does not detect
the vehicle and will accelerate to preset speed.
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2003 LS430 Laser Cruise (OM50602U) from Aug. '02 Prod.