Lexus GS430 User Manual page 426

5 Resuming the preset speed
If the preset speed has been cancelled, when you push the
lever up in the "+ RES" direction while "RADAR READY"
shows up on the multi−information display and at a vehicle
speed of about more than 40 km/h (25 mph), the speed set
prior to cancellation will be restored.
During follow−up cruising, if there are no vehicles running
ahead because they have changed lanes, your vehicle will
accelerate gradually up to the preset speed.
STARTING AND DRIVING
CAUTION
D Deceleration
cruising function
warning do not operate when the vehicle ahead is at
a stop or driving very slowly.
D While vehicle−to−vehicle distance control is on (on
follow−up cruising), acceleration and deceleration
are automatically performed in proportion to the
speed of the vehicle ahead detected. However, if the
vehicle ahead of you decelerates abruptly or if
another vehicle cuts in ahead of you, your vehicle
may collide with the vehicle ahead unless you
manually depress the brake pedal to slow down your
vehicle. If you need to accelerate because the vehicle
ahead or you changes lanes, then depress the
acceleration pedal.
D Depending on the road configuration (curved roads,
left and right continuous curved roads, driving at the
start or end of the curve, narrow driving lanes due to
road construction) or your vehicle condition
(steering wheel maneuvering, position in the lane or
unstable driving because of an accident or
breakdown), vehicles in other lanes or surrounding
objects will be detected, resulting in a control failure
or the activated approach warning. This may also
result in a very close distance between vehicles due
to a failure to detect the vehicle ahead. Maneuvering
the steering wheel in response to a violent lateral
wind will cause similar conditions.
and approach
405