Lexus GS430 User Manual page 437

The vehicle−to−vehicle distance is always set to "Long" when
the engine switch is turned on.
CAUTION
D Select
the vehicle−to−vehicle
considering traffic conditions. The approximate
vehicle−to−vehicle distance
interval when driving at 80 km/h (50 mph) is
shown below :
"Long" . . . . . . . . about 50 m (about 164 ft.)
"Middle" . . . . . . about 40 m (about 132 ft.)
"Short" . . . . . . . about 30 m (about 100 ft.)
If the vehicle speed is slower than 80 km/h (50 mph),
the distance will be shorter than the above.
D During long downhill driving, the vehicle−to−vehicle
distance will be shorter than the selected distance.
(e) Braking control
Dynamic radar cruise control is not a collision avoidance
system. If an approach warning is activated, depress the brake
pedal
vehicle−to−vehicle distance.
distance
based on time
" 1 Under the vehicle−to−vehicle distance control
2 Braking activated
Braking control is operating only when the vehicle−to−vehicle
distance control mode is selected and your vehicle speed
exceeds about 40 km/h (25 mph).
If you are getting closer to the vehicle ahead at relatively higher
speed than those of the vehicle ahead or if engine braking
cannot be applied properly, braking control is automatically
activated.
multi−information display, indicating that the brakes are being
used.
STARTING AND DRIVING
to decelerate to ensure
G31017
At this time, "BRAKE" flashes on the
an appropriate
413