Toyota Lexusc Owner's Handbook Manual page 485

STARTING AND DRIVING
For the vehicle-to-vehicle distance control mode, see
"Vehicle-to-vehicle distance control mode" on page 466. For
the conventional (fixed speed) cruise control mode, see
"Conventional (fixed speed) cruise control mode" on page 481.
466
Vehicle-to-vehicle distance control mode
The laser radar sensor in this system primarily detects the
reflectors of the vehicle ahead of you to determine the
presence of the vehicle ahead as well as measuring 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