Lexus RX400h2006 Owner's Manual page 450

For details about the vehicle−to−vehicle distance control
mode, see "Vehicle−to−vehicle distance control mode" on
page 423. For details about the conventional cruise control
mode, see "Conventional cruise control mode" on page 438.
STARTING AND DRIVING
Vehicle−to−vehicle distance control mode
The system's laser radar sensor detects the reflectors of
vehicles and measures the vehicle−to−vehicle distance.
The detection range of the sensor is about 120 m (400 ft.)
ahead.
CAUTION
Dynamic laser cruise
collision−avoidance system and will not prevent
accidents. Dynamic laser cruise control is a vehicle
speed control device that is intended for use only on
freeways or roads where the traffic is light or moderate.
To avoid serious injury, you must use caution and be
attentive to road and traffic conditions while using
dynamic laser cruise control.
control is not a
423