Lexus RZ (2023 year). Manual in english

313

6-2. Using the safe driving support functions

Driving support

system



The proactive driving assist can be
enabled/disabled through a custom-
ize setting. (



P.612)



The following settings of the proac-
tive driving assist can be changed
through customize settings.
(



P.612)

WARNING

●

When suddenly approaching a detect-

able object

●

When a preceding vehicle or motor-

cycle is not directly in front of your

vehicle

●

When there is a structure above a

detectable object

●

When part of a detectable object is

hidden by another object (large lug-

gage, umbrella, guardrail, etc.)

●

When multiple detectable objects are

overlapping

●

When a bright light, such as the sun or

headlights of another vehicle, is

reflecting off of the detectable object

●

When the detectable object is white

and looks extremely bright

●

When the color or brightness of the

detectable object causes it to blend in

with its surroundings

●

When a detectable object cuts in front

of or emerges from beside a vehicle

●

When approaching a vehicle ahead

which is perpendicular or at an angle

to the vehicle, or is facing the vehicle

●

If a parked vehicle is perpendicular or

at an angle to the vehicle

●

When a bicycle is a child sized bicycle,

is carrying a large load, is carrying an

extra passenger, or has an unusual

shape (bicycles equipped with a child

seat, tandem bicycles, etc.)

●

When a pedestrian or bicyclist is

shorter than approximately 1 m (3.2 ft.)

or taller than approximately 2 m (6.5

ft.)

●

When the silhouette of a pedestrian or

bicyclist is unclear (such as when they

are wearing a raincoat, long skirt, etc.)

●

When a pedestrian or bicyclist is

bending forward or squatting

●

When a pedestrian or bicyclist is mov-

ing at high speed

●

When a pedestrian is pushing a

stroller, wheelchair, bicycle or other

vehicle

●

When a detectable object blends in

with the surrounding area, such as

when it is dim (at dawn or dusk) or

dark (at night, in a tunnel, etc.)

●

When the lane width is 4 m (13.1 ft.) or

●

When the lane width is 2.5m (8.2 ft.)

or less

●

When the vehicle has not been driven

for a certain amount of time after the

EV system was started

●

While turning left or right or a few sec-

onds after turning left or right

●

While changing lanes or a few seconds

after changing lanes

●

When entering a curve, driving around

a curve and a few seconds after driving

around a curve

Changing proactive driving assist
settings

314

6-2. Using the safe driving support functions

Depending on the situation, the following indicators or icons will be displayed.
Some icons cannot be displayed unless the display is changed to the driving safety
support function information screen.

■

Hands off steering wheel warning oper-

ation

In the following situations, a message urging

the driver to grip the steering wheel and the

icon shown in the illustration will be dis-

played on the display to warn the driver. If

the system detects that the steering wheel is

held, the warning will be canceled. When

using the system, make sure to grip the

steering wheel firmly, regardless of whether

the warning is operating or not.

System operation display

Icon

Meaning



White: Monitoring for detectable objects



Green: Detectable object crossing the road or detectable object on
the side of the road assistance operating

A pedestrian has been detected as crossing the road or on the side of
the road and brake or steering assistance is operating

A vehicle has been detected on the side of the road and brake or steer-
ing operation assistance is being performed



Steering operation assistance is being performed to prevent the
vehicle from approaching too close to a detectable object on the
side of the road



When the steering assist is operating

Preceding vehicle deceleration assistance is being performed

Warning to maintain appropriate vehicle-to-vehicle distance

Curve deceleration assistance is being performed

315

6-2. Using the safe driving support functions

Driving support

system

●

When assistance to a detectable object

crossing the road or assistance to a

detectable object on the side of the road

is performed and the system determines

the driver is not holding the steering

wheel

If no operations are detected for a certain
amount of time, a buzzer will sound, the
warning will operate. This warning may
also operate if the driver only operates
steering wheel a small amount continu-
ously.

■

Warning operation after preceding

vehicle deceleration assistance has

ended

After preceding vehicle deceleration assis-

tance has ended, if the driver does not

operate the brake pedal or accelerator

pedal and the vehicle approaches the

preceding vehicle, the display will flash and

a buzzer will sound to urge the driver to

decelerate. If the system determines that

the driver is operating the brake pedal or

accelerator pedal, the warning will be

canceled.

: If equipped



When the system detects a vehicle
approaching from the left or right in
front of your vehicle when
approaching an intersection, a noti-
fication will be displayed.



Head-up display (if equipped)



When the system determines that
your vehicle may be about to enter
an intersection even though a vehi-
cle is approaching from the left or
right in front of your vehicle, a
buzzer will sound and a message
will be displayed to urge you to

Front Crossing Traffic Alert

FCTA (Front Crossing Traffic
Alert)

When approaching an intersec-
tion, etc., at a low speed, vehicles
approaching from the left and right
of the front of the vehicle can be
detected and the driver informed of
these vehicles.

FCTA system control

316

6-2. Using the safe driving support functions

depress the brake pedal.



Multi-information display

■

FCTA system operating conditions

The system will operate when all of the fol-

lowing conditions are met:

●

A shift position other than P or R is

selected

●

The vehicle speed is approximately 15

km/h (10 mph) or less

●

A vehicle is approaching from the left or

right in front of your vehicle at a speed

between approximately 10 to 60 km/h (7

to 37 mph)

●

There are no vehicles in front of your

vehicle

●

The accelerator pedal is not being

strongly depressed

●

The brake pedal is not being strongly

depressed

■

Situations in which the system may

operate even though no vehicles are

approaching

In certain situations, such as the following,

the system may operate even though no

vehicles are approaching:

●

When approaching objects on the road-

side, such as guardrails, traffic signs, util-

ity poles, street lights, trees, tall grass,

walls, etc.

●

When passing an object on the side of the

road, such as a parked vehicle

●

When a vehicle or pedestrian is

approaching from the left or right in front

of your vehicle in the distance

●

When a vehicle or pedestrian is moving

within a parking spot, etc., next to the lane

your vehicle is in

●

When a pedestrian or bicyclist is

approaching on a sidewalk

●

When a vehicle or pedestrian is moving

away from your vehicle

●

When an approaching vehicle is deceler-

ating or stops

●

When an approaching vehicle makes a

left/right turn immediately in front of your

vehicle

●

When a pedestrian is approaching your

vehicle

●

When an oncoming vehicle makes a

right/left turn

●

When your vehicle enters an intersection

before a vehicle approaching from the

left or right in front of your vehicle

●

When stopped at traffic light and a vehi-

cle approaches from the left or right in

front of your vehicle

●

When making a left/right turn in front of

an approaching vehicle

WARNING

■

For safe use

Driving safely is solely the responsibility

of the driver. Pay careful attention to the

surrounding conditions in order to

ensure safe driving. The FCTA system is

a supplementary system that informs the

driver of vehicles approaching from the

left and right of the front of the vehicle.

Over-reliance on this system may lead to

an accident resulting in death or serious

injury. The details of the warning display

may differ from the actual traffic condi-

tions. Although the warning display will

stop being displayed after a certain

amount of time, this does not necessarily

indicate that there are no longer any

vehicles or pedestrians around your

vehicle.

317

6-2. Using the safe driving support functions

Driving support

system

●

When an oncoming vehicle approaches

and passes

●

When being overtaken by another vehi-

cle

●

When driving next to another vehicle or a

pedestrian

●

When a vehicle or pedestrian

approaches the side of your vehicle

■

Situations in which the system may not

operate properly

In situations such as the following, a vehicle

may not be detected by a front side radar

sensor and the system may not operate

properly:

●

If an approaching vehicle moves sud-

denly (sudden steering, acceleration,

deceleration, etc.)

●

If a vehicle is approaching from the left or

right of the front of your vehicle diago-

nally

●

When a vehicle is approaching from the

left or right in front of your vehicle in the

distance

●

When there is an object between your

vehicle and an approaching vehicle

●

When several vehicles are approaching

with little space between them

●

Situations in which the sensors may not

operate properly:



P.280

●

Situations in which some or all of the

functions of the system cannot operate:



P.282



The FCTA can be enabled/disabled
through a customize setting.
(



P.610)



The following settings of the FCTA
can be changed through customize
settings. (



P.610)

Changing FCTA system settings

318

6-2. Using the safe driving support functions

: For details about updates, refer to the

“MULTIMEDIA OWNER’S MANUAL”.



When the front camera detects a
sign or information of a sign is avail-
able from the navigation system, the
sign will be displayed on the display.



Multiple signs can be displayed.

Depending on the specifications of the
vehicle, the number of displayed signs may
be limited.

■

Operating conditions of sign display

Signs will be displayed when the following

conditions are met:

●

The system has detected a sign

In the following situations, a displayed sign

may stop being displayed:

●

When a new sign has not been detected

for a certain distance

●

When the system determines that the

road being driven on has changed, such

as after a left or right turn

■

Situations in which the display function

may not operate properly

In the following situations, the RSA system

may not operate properly and may not

detect signs or may display the incorrect

sign. However, this does not indicate a mal-

function.

●

When a sign is dirty, faded, tilted or bent

●

When the contrast of an electronic sign is

low

Road Sign Assist

RSA (Road Sign Assist)

The RSA system detects specific
road signs using the front camera
and/or navigation system (when
speed limit information is available)
and warns the driver via displays
and buzzers.

Vehicles with connected naviga-
tion (with built-in navigation sys-
tem): In order to maintain
performance of the speed limit dis-
play function, it is necessary to
update map data

on a regular

basis.

WARNING

■

For safe use

●

Regardless of the availability of RSA

display/buzzer, including conditional

speed limit alert, it is the driver who is

solely responsible for driving safely

and abiding by the regulations. There-

fore, do not overly rely on this system.

The driver is solely responsible for

paying attention to the vehicle’s

surroundings and driving safely.

●

Do not rely solely upon the RSA. The

RSA assists the driver by providing

road sign information, but it is not a

replacement for the driver’s own vision

and awareness. Driving safely is solely

the responsibility of the driver. Pay

careful attention to the surrounding

conditions in order to ensure safe driv-

ing.

■

Situations in which the RSA should

not be used

●

When it is necessary to disable the sys-

tem:



P.276

■

Situations in which the system may

not operate properly

●

Situations in which the sensors may not

operate properly:



P.280

Display Function

319

6-2. Using the safe driving support functions

Driving support

system

●

When all or part of a sign is hidden by a

tree, utility pole, etc.

●

When a sign is detected by the front cam-

era for a short amount of time

●

When the driving state (turning, chang-

ing lanes, etc.) is judged incorrectly

●

When a sign is immediately after a free-

way junction or in an adjacent lane just

before merging

●

When stickers are attached to the rear of

a preceding vehicle

●

When a sign similar to a system compati-

ble sign is detected as a system compati-

ble sign

●

When a speed limit sign for a frontage

road is within detection range of the front

camera

●

When driving around a roundabout

●

When a sign intended for trucks, etc. is

detected

●

When the vehicle is driven in a country

with a different direction of traffic

●

When the navigation system map data is

out of date

●

When the navigation system cannot be

used

In this case, the speed limit signs displayed

on the multi-information display and navi-

gation system display may differ.

In the following situations, the RSA sys-
tem will output a warning to notify the
driver.

: The availability of emphasized display

and buzzer depends on the country
where the vehicle is available.



If the vehicle speed exceeds the
speed warning threshold of the
speed limit sign displayed on the
display, the sign display will be
emphasized and a buzzer will

sound.

Also when the limit speed to be displayed
is changed due to the change of driving
zones, etc., the sign display will be empha-
sized and a buzzer will sound

to alert the

driver.



When the RSA system detects a
no-entry sign and determines that
the vehicle has entered the no-entry
area based on the map information
of the navigation system, the
no-entry sign displayed on the
multi-information display will flash
and a buzzer will sound.

■

Operating conditions of the notification

functions

●

Excess speed notification function

This function will operate when the follow-

ing condition is met:

• A speed limit road sign is recognized by

the system.

●

No entry notification function

This function will operate when all of the

following conditions are met:

• More than one no entry road signs are

recognized by the system simultaneously.

• The vehicle is passing between no entry

road signs recognized by the system.

• The vehicle is equipped with an on-board

navigation system.



The following types of road signs
can be displayed.

However, non-standard or recently intro-
duced traffic signs may not be displayed.

• Speed limit road signs

: No speed limit information

is dis-

played when neither speed limit road

Notification function

Types of road signs supported

320

6-2. Using the safe driving support functions

sign nor speed limit related information
is available.

• Speed limit related information

*2*3

: Displayed when a sign is detected but

speed limit information for the road is
not available from the navigation sys-
tem.

: No speed limit information

is dis-

played when neither speed limit road
sign nor speed limit related information
is available.

• No overtaking road signs

• Other road signs

• Speed limit with supplemental mark

: Displayed simultaneously with a speed

limit sign.

Speed limit

begins/Maximum

speed zone begins

Speed limit

ends/Maximum

speed zone ends

Motorway

Motorway exit

Expressway

Expressway exit

Urban area begin-

ning

Urban area ending

Residential area

beginning

Residential area

ending

No overtaking

begins

No overtaking ends

No-entry

End of prohibition

Stop

Warning

Ice

Supplemental mark

exists

321

6-2. Using the safe driving support functions

Driving support

system

: Content not recognized.



Depending on the specifications of
the vehicle, signs may be displayed
overlapping.

The following settings of the RSA can
be changed through customize set-
tings.



P.612

Exit ramp on right

Exit ramp on left

Time

Duplicate display

example

Changing RSA settings

Dynamic radar cruise con-
trol

Dynamic radar cruise control

This dynamic radar cruise control
detects the presence of vehicles
ahead, determines the current
vehicle-to-vehicle distance, and
operates to maintain a suitable dis-
tance from the vehicle ahead. The
desired vehicle-to-vehicle distance
can be set by operating the vehi-
cle-to-vehicle distance switch.

Use the dynamic radar cruise con-
trol only on highways and express-
ways.

WARNING

■

For safe use

●

Driving safely is solely the responsibil-

ity of the driver. Do not overly rely on

this system, and pay careful attention

to the surrounding conditions in order

to ensure safe driving.

●

The dynamic radar cruise control pro-

vides driving assistance to reduce the

driver’s burden. However, there are

limitations to the assistance provided.

Read the following items carefully. Do

not overly rely on this system and always

drive carefully.
• Conditions under which the system

may not operate correctly:



P.330

●

Set the speed appropriately according

to the speed limit, traffic flow, road

conditions, weather conditions, etc.

The driver is responsible for confirm-

ing the set speed.

322

6-2. Using the safe driving support functions

WARNING

●

Even if the system is operating cor-

rectly, the condition of a preceding

vehicle as recognized by the driver

and detected by the system may differ.

Therefore, it is necessary for the driver

to pay attention, assess risks, and

ensure safety. Over-reliance on this

system to drive the vehicle safely may

lead to an accident resulting in death

or serious injury.

■

Precautions for the driving assist sys-

tems

Observe the following precautions, as

there are limitations to the assistance

provided by the system. Over-reliance

on this system may lead to an accident

resulting in death or serious injury.

●

Details of support provided for the

driver’s vision

The dynamic radar cruise control is only

intended to help the driver in determin-

ing the distance between the driver’s own

vehicle and a designated preceding vehi-

cle. It is not a system which allows for

careless or inattentive driving, and is not

a system which assists in poor visibility

conditions.
The driver must pay attention to their

surroundings, even when the vehicle

stops.

●

Details of support provided for the

driver’s judgement

The dynamic radar cruise control deter-

mines whether the distance between the

driver’s own vehicle and a designated

preceding vehicle is within a set range. It

is not capable of making any other type

of judgement. Therefore, it is absolutely

necessary for the driver to remain vigi-

lant and to determine whether or not

there is a possibility of danger.

●

Details of support provided for the

driver’s operation

The dynamic radar cruise control does

not include functions which will prevent

or avoid collisions with vehicles ahead of

your vehicle. Therefore, if there is ever

any possibility of danger, the driver must

take immediate and direct control of the

vehicle and act appropriately in order to

ensure safety.

■

Situations in which the dynamic radar

cruise control should not be used

Do not use the dynamic radar cruise

control in the following situations. As the

system will not be able to provide appro-

priate control, using it may lead to an

accident resulting in death or serious

injury.

●

Roads where there are pedestrians,

cyclists, etc.

●

When driving on a highway or

expressway entrance or exit

●

When the approach warning sounds

frequently

●

Situations in which the sensors may not

operate properly:



P.280

●

Situations in which the lane may not be

detected:



P.282

323

6-2. Using the safe driving support functions

Driving support

system

Constant speed cruising:
When there are no vehicles ahead

The vehicle drives at the speed set by the driver.
If the set vehicle speed is exceeded while driving down a hill, the set vehicle speed display
will blink and a buzzer will sound.

Deceleration and follow-up cruising:
When a preceding vehicle driving slower than the set vehicle speed is detected

When a vehicle is detected driving ahead of your vehicle, the vehicle automatically decel-
erates and if a greater reduction in vehicle speed is necessary, the brakes are applied (the
stop lights will come on at this time). The vehicle is controlled to maintain the vehi-
cle-to-vehicle distance set by the driver, in accordance with changes in the speed of the
preceding vehicle. If vehicle deceleration is not sufficient and the vehicle approaches the
vehicle ahead, the approach warning will sound.

Acceleration:
When there are no longer any preceding vehicles driving slower than the set
vehicle speed

The vehicle accelerates until the set vehicle speed is reached and then resumes constant
speed cruising.

Starting off:

If a preceding vehicle stops, the vehicle will also stop (controlled stop). After the preceding

Basic functions

324

6-2. Using the safe driving support functions

vehicle starts off, pressing the “RES” switch or depressing the accelerator pedal will resume
follow-up cruising (start off operation). If a start off operation is not performed, the con-
trolled stop will continue.
Vehicles with driver monitor and LCA: While driving on a highway or expressway, if a
preceding vehicle stops, your vehicle will stop accordingly. On some highways and
expressways, if the system determines that the preceding vehicle starts off within approxi-
mately 3 minutes of stopping, a buzzer will sound and a message will be displayed on the
multi-information display to notify the driver, and your vehicle will start off accordingly fol-
lowing the preceding vehicle. (Extended resume time)

■

Meter display

Multi-information display
Set vehicle speed
Indicator

■

Switches



Vehicles without a head-up display

Driving assist mode select switch
Driving assist switch

“+” switch/“RES” switch
“-” switch
Cancel switch
Vehicle-to-vehicle distance switch



Vehicles with a head-up display

The function of each switch differs
depending on the conditions and
settings.

When a switch is touched, the function of
each switch is displayed on the head-up
display. If the head-up display is off, the
functions will be displayed on the

System components

A
B
C

A
B

C
D

E
F

325

6-2. Using the safe driving support functions

Driving support

system

multi-information display.

Driving assist mode select switch
Driving assist switch
“RES” switch

“+” switch
“-” switch
Vehicle-to-vehicle distance switch
Cancel switch

Press the driving assist mode select switch to select dynamic radar cruise con-
trol.

The dynamic radar cruise control indicator will illuminate.



Vehicles without a head-up display



Vehicles with a head-up display

Using the accelerator pedal, accelerate or decelerate to the desired vehicle
speed (approximately 30 km/h [20 mph] or more), and press the driving assist
switch to set the set vehicle speed.

The set vehicle speed will be displayed on the multi-information display.
The vehicle speed at the moment the switch is released will be the set vehicle speed.

B
C
D

E
F

Using the dynamic radar cruise control

Setting the vehicle speed

327

6-2. Using the safe driving support functions

Driving support

system



Vehicles with a head-up display

Increase set vehicle speed

Decrease set vehicle speed

Short press adjustment: Press the switch
Long press adjustment: Press and hold the switch until the desired set vehicle speed is
reached.

The set vehicle speed will increase or decrease as follows:

Short press adjustment: By 1 km/h (0.6 mph) or 1 mph (1.6 km/h) each time the switch is
pressed
Long press adjustment: Increases or decreases in 5 km/h (3.1 mph) or 5 mph (8 km/h)
increments continuously while the switch is pressed and held
The set vehicle speed adjustment increment can be changed through a customize setting.



Increasing the set vehicle speed using the accelerator pedal

Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.

Press the “+” switch.



Vehicles without a head-up display

Canceling/resuming control

329

6-2. Using the safe driving support functions

Driving support

system



Vehicles with a head-up display

The actual vehicle-to-vehicle distance varies in accordance with the vehicle speed. Also,
when the vehicle is stopped by system control, it will be stopped at a certain distance from
the preceding vehicle, depending on the situation, regardless of the setting.

■

Operating conditions

●

The shift position is in D.

●

The desired set speed can be set when

the vehicle speed is approximately 30

km/h (20 mph) or more.

• If the vehicle speed is set while driving at

below approximately 30 km/h (20 mph),

the set vehicle speed will be approxi-

mately 30 km/h (20 mph).

• If the vehicle speed is set while driving at

a speed that exceeds the system’s upper

limit, the set vehicle speed will be the sys-

tem’s upper limit.

■

Accelerating after setting the vehicle

speed

As with normal driving, acceleration can be

performed by depressing the accelerator

pedal. After accelerating, the vehicle will

return to the set vehicle speed. However,

while in vehicle-to-vehicle distance control

mode, the vehicle speed may decrease to

below the set vehicle speed in order to

maintain the distance from the preceding

vehicle.

■

When the vehicle is stopped by system

control during follow-up cruising

●

When the “RES” switch is pressed while

the vehicle is stopped by system control,

if the preceding vehicle starts off within

approximately 3 seconds, follow-up

cruising will resume.

●

If the preceding vehicle starts off within

approximately 3 seconds of the vehicle

being stopped by system control, fol-

low-up cruising will resume.

■

Automatic cancellation of vehi-

cle-to-vehicle distance control mode

In the following situations, vehicle-to-vehi-

cle distance control mode will be canceled

automatically:

●

When the brake control or output restric-

tion control of a driving support system

operates

(For example: Pre-Collision System,

Illustration
Number

Vehicle-to-vehicle distance

Approximate Distance (Vehicle Speed:
100 km/h [60 mph])

Short

Approximately 25 m (85 ft.)

Medium

Approximately 30 m (100 ft.)

Long

Approximately 45 m (145 ft.)

Extra long

Approximately 60 m (200 ft.)

330

6-2. Using the safe driving support functions

drive-start control)

●

When the parking brake has been oper-

ated

●

When the vehicle is stopped by system

control on a steep incline

●

When any of the following are detected

while the vehicle is stopped by system

control:

• The driver’s seat belt is unfastened

• The driver’s door is opened

• Approximately 3 minutes have elapsed

since the vehicle was stopped

The parking brake may be activated auto-

matically.

●

Situations in which some or all of the

functions of the system cannot operate:



P.282

■

Dynamic radar cruise control system

warning messages and buzzers

For safe use:



P.275

■

Preceding vehicles that the sensor may

not detect correctly

In the following situations, depending on the

conditions, if the system cannot provide suf-

ficient deceleration or acceleration is nec-

essary, operate the brake pedal or

accelerator pedal.
As the sensor may not be able to correctly

detect these types of vehicles, the approach

warning (



P.330) may not operate.

●

When a vehicle cuts in front of your vehi-

cle or changes lanes away from your

vehicle extremely slowly or quickly

●

When changing lanes

●

When a preceding vehicle is driving at a

low speed

●

When a vehicle is stopped in the same

lane as the vehicle

●

When a motorcycle is traveling in the

same lane as the vehicle

■

Conditions under which the system may

not operate correctly

In the following situations, operate the

brake pedal (or accelerator pedal, depend-

ing on the situation) as necessary.

As the sensor may not be able to correctly

detect a vehicle, the system may not oper-

ate properly.

●

When a preceding vehicle brakes sud-

denly

●

When changing lanes at low speeds, such

as in a traffic jam

■

Conditions for extended resume time

(Vehicles with driver monitor and LCA)

Extended resume time is activated when all

of the following conditions are satisfied:

●

The vehicle is driving on a vehicle-only

road, such as an expressway.

●

There is a preceding vehicle and the sys-

tem is able to detect it.

●

No vehicle interruptions occur.

●

The preceding vehicle has not been

replaced.

●

Clearance sonar and FCTA are not

detecting the object in front of you.

●

The driver monitor judges that the driver

is looking forward.

●

The steering wheel has not been oper-

ated.

●

The brake pedal has not been operated.

In situations where the vehicle
approaches a preceding vehicle and
the system cannot provide sufficient
deceleration, such as if a vehicle cuts in
front of the vehicle, a warning display
will flash and a buzzer will sound to
alert the driver. Depress the brake
pedal to ensure appropriate vehi-
cle-to-vehicle distance.

■

Warnings may not occur when

In the following situations, the warning
may not operate even though the vehi-
cle-to-vehicle distance is short.

Approach warning

331

6-2. Using the safe driving support functions

Driving support

system



When the preceding vehicle is
traveling at the same speed or faster
than your vehicle



When the preceding vehicle is
traveling at an extremely low speed



Immediately after the vehicle speed
has been set



When the accelerator pedal is
depressed

When a curve is detected, the vehicle
speed will begin being reduced. When
the curve ends, the vehicle speed
reduction will end.

Depending on the situation, the vehicle
speed will then return to the set vehicle
speed.
In situations where vehicle-to-vehicle dis-
tance control needs to operate, such as
when a preceding vehicle cuts in front of
your vehicle, the curve speed reduction
function will be canceled.

■

Situations in which the curve speed

reduction function may not operate

In situations such as the following, the curve

speed reduction function may not operate:

●

When the vehicle is being driven around

a gentle curve

●

When the accelerator pedal is being

depressed

●

When the vehicle is being driven around

an extremely short curve

If a detected vehicle in the passing lane
is traveling slower than your vehicle,
overtaking will be suppressed.

The overtaking prevention function will not
operate if the passing lane is congested or
vehicles are traveling at low speeds.
This function is not available for vehicles
without a DCM.

While a warning of the driver monitor
is being displayed, the vehicle acceler-
ation will be restrained.
When the warning of the driver moni-
tor disappears, the restrained acceler-
ation control will end.

If your vehicle is being driven at
approximately 80 km/h (50 mph) or
more and a lane change to the passing
lane is performed, when the turn signal
lever is operated and the lane is
changed, the vehicle will accelerate up
to the set speed to assist in overtaking.

For vehicles with a DCM: The system’s rec-
ognition of which lane is the passing lane is
determined by location information and
the driving condition of surrounding vehi-
cles. The support for lane change function
and overtaking prevention function may

Curve speed reduction function

Overtaking prevention function

Driver Monitor support function

Support for lane change

332

6-2. Using the safe driving support functions

not operate if it is difficult to obtain location
information or there are few surrounding
vehicles.
For vehicles without a DCM: The system’s
recognition of which lane is the passing
lane may be based solely on the location of
the steering wheel in the vehicle (left-hand
drive/right-hand drive). If the vehicle is
driven in a location where the passing lane
is on the opposite side of that where the
vehicle was originally sold, the vehicle may
accelerate when the turn signal lever is
operated away from the passing lane. (e.g.

The vehicle was manufactured for a
right-hand traffic location, but is being
driven in a left-hand traffic location. The
vehicle may accelerate when the turn sig-
nal lever is operated to the right.)

If your vehicle is being driven at
approximately 80 km/h (50 mph) or
more and the lane is changed to that
with a vehicle traveling slower than
your vehicle, when the turn signal lever
is operated the vehicle will gradually
decelerate to assist in changing lanes.

When RSA function is enabled and the dynamic radar cruise control system is
operating, if a speed limit sign is detected, the detected speed limit will be dis-
played with an up/down arrow. The set speed can be increased/reduced to the
detected speed limit by pressing and holding the “+” switch or “-” switch.



Vehicles without a head-up display

Press and hold the “+” switch.

Dynamic Radar Cruise Control with Road Sign Assist

When the set speed is lower than the detected speed limit

334

6-2. Using the safe driving support functions

situations where the RSA may not operate

or cannot detect signs correctly (



P.318),

when using this function, make sure to con-

firm the actual speed limit.
In the following situations, the set speed

may not change to the detected speed limit

by pressing and holding the “+” switch or “-”

switch:

●

When speed limit information is not avail-

able

●

When the detected speed limit is the

same as the set speed

●

When the detected speed limit is outside

of the speed range which the dynamic

radar cruise control system can operate



The settings of Dynamic radar cruise control can be changed through custom-
ize settings. (



P.611)

The operating state of Dynamic radar cruise control is indicated.

Changing Dynamic radar cruise control settings

Display and system operation state

Indicator

Multi-information display

Situation

White

Vehi-

cle-to-vehicle

distance set-

ting: Gray

Dynamic radar

cruise control

being OFF

Green

Vehi-

cle-to-vehicle

distance set-

ting: Blue

Set vehicle

speed: Green

Constant

speed cruising

335

6-2. Using the safe driving support functions

Driving support

system

Green

Vehi-

cle-to-vehicle

distance set-

ting: Blue

Set vehicle

speed: Green

Preceding

vehicle: White

Follow-up

cruising

Green

Vehi-

cle-to-vehicle

distance set-

ting: Orange

flashing

Set vehicle

speed: Green

Preceding

vehicle:

Orange flash-

ing

Approach

warning

Green

Vehi-

cle-to-vehicle

distance set-

ting: Gray

Set vehicle

speed: White

Preceding

vehicle: Gray

Accelerating

with the accel-

erator pedal

Green

Set vehicle

speed: Green
in reverse dis-

play

Set vehicle

speed being

exceeded

Indicator

Multi-information display

Situation

336

6-2. Using the safe driving support functions

■

Meter display

Set vehicle speed
Cruise control indicator

■

Switches



Vehicles without a head-up display:

Driving assist mode select switch
Driving assist switch
“+” switch, “RES” switch
“-” switch
Cancel switch

Cruise Control

Cruise control

The vehicle can be driven at a set
speed even if the accelerator pedal
is not depressed.

Use the cruise control only on high-
ways and expressways

WARNING

■

For safe use

●

Driving safely is solely the responsibil-

ity of the driver. Therefore, do not

overly rely on this system. The driver is

solely responsible for paying attention

to the vehicle’s surroundings and driv-

ing safely.

●

Set the speed appropriately according

to the speed limit, traffic flow, road

conditions, weather conditions, etc.

The driver is responsible for confirm-

ing the set speed.

■

Situations in which cruise control

should not be used

Do not use the cruise control in the fol-

lowing situations. As the system will not

be able to provide appropriate control,

using it may lead to an accident resulting

in death or serious injury.

●

On roads with sharp bends

●

On winding roads

●

On slippery roads, such as those cov-

ered with rain, ice or snow

●

On steep downhills, or where there

are sudden changes between sharp up

and down gradients

Vehicle speed may exceed the set speed

when driving down a steep hill.

●

When it is necessary to disable the sys-

tem:



P.276

System Components

A
B

A
B
C
D

337

6-2. Using the safe driving support functions

Driving support

system



Vehicles with a head-up display:

The function of each switch differs
depending on the conditions and
settings.

When a switch is touched, the function of
each switch is displayed on the head-up
display. If the head-up display is off, the
functions will be displayed on the
multi-information display.

Driving assist mode select switch
Driving assist switch
“RES” switch
“+” switch
“-” switch
Cancel switch

Press the driving assist mode select switch to select cruise control.

The cruise control indicator will illuminate.



Vehicles without a head-up display

B
C
D

E
F

Using the cruise control

Setting the vehicle speed

339

6-2. Using the safe driving support functions

Driving support

system



Vehicles without a head-up display

Increase set vehicle speed

Decrease set vehicle speed



Vehicles with a head-up display

Increase set vehicle speed

Decrease set vehicle speed

The set vehicle speed will increase or decrease as follows:

Fine adjustment: By 1 km/h (0.6 mph) or 1 mph (1.6 km/h) each time the switch is pressed
Large adjustment: Increases continuously while the switch is pressed and held



Increasing the set vehicle speed using the accelerator pedal

Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.

Press the “+” switch.

Press the cancel switch or driving assist switch to cancel control.

Control will also be canceled if the brake pedal is depressed.

Canceling/resuming control

340

6-2. Using the safe driving support functions



Vehicles without a head-up display



Vehicles with a head-up display

Press the “RES” switch to resume control.

■

Automatic cancellation of the cruise

control

In the following situations, the cruise control

will be canceled automatically:

●

When the vehicle speed drops approxi-

mately 16 km/h (10 mph) or more below

the set vehicle speed

●

When the vehicle speed drops below

approximately 30 km/h (20 mph)

●

When the brake control or output restric-

tion control of a driving support system

operates (For example: PCS, drive-start

control)

●

When the parking brake has been oper-

ated

●

Situations in which some or all of the

functions of the system cannot operate:



P.282

The operating state of cruise control is indicated.

Display and system operation state

342

6-2. Using the safe driving support functions

■

Exceeding the set speed

In the following situations, if the vehicle

speed exceeds the set vehicle speed, the

displayed set vehicle speed will flash:

●

When the accelerator pedal is deeply

depressed

●

When driving down a slope

■

Automatic cancellation of the speed

limiter

Situations in which some or all of the func-

tions of the system cannot operate:



P.282

■

Changes in brake operation sound and

pedal response



P.282

■

Customization

Some functions can be customized.

(



P.611)

■

Meter display

Set vehicle speed
Speed limiter indicator

■

Switches



Vehicles without a head-up display

Driving assist mode select switch
Driving assist switch
“+” switch / “RES” switch
“ - ” switch
Cancel switch

Speed Limiter

Speed limiter

A desired maximum speed can be
set using the speed limiter switch.
The speed limiter prevents the vehi-
cle speed from exceeding the set
speed.

WARNING

■

Situations in which speed limiter

should not be used

●

Situations in which the sensors may not

operate properly:



P.280

●

When it is necessary to disable the sys-

tem:



P.276

System Components

A
B

A
B
C
D

343

6-2. Using the safe driving support functions

Driving support

system



Vehicles with a head-up display

The function of each switch differs
depending on the conditions and
settings.

When a switch is touched, the function of
each switch is displayed on the head-up
display. If the head-up display is off, the
functions will be displayed on the
multi-information display.

Driving assist mode select switch
Driving assist switch
“RES” switch
“ + ” switch
“ - ” switch
Cancel switch

Press the driving assist mode select switch to select the speed limiter.

The speed limiter indicator will illuminate in white.



Vehicles without a head-up display

B
C
D

E
F

Using the speed limiter

Setting the maximum vehicle speed

Lexus RZ (2023 year). Manual in english - page 10