Lexus NX450H+ (2022 year). Manual in english - page 31

Road Sign Assist

RSA (Road Sign Assist)

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

WARNING

■

For safe use

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 driving.

■

Situations in which the RSA should not be used

●

When it is necessary to disable the system:

→

P.371

■

Situations in which the system may not operate properly

●

Situations in which the sensors may not operate properly:

→

P.376

Displays on the display

When the front camera detects a sign or information of a sign is available 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.

INFORMATION

■

Display function operating conditions

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When the system determines that a sign is no longer valid

●

When the system determines that the road being driven on has changed, such as after
a left or right turn

6-2. Using the safe driving support functions

510

■

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 malfunction.

●

When a sign is dirty, faded, tilted or bent

●

When the contrast of an electronic sign is low

●

When all or part of a sign is hidden by a tree, utility pole, etc.

●

When a sign is detected by the front camera for a short amount of time

●

When the driving state (turning, changing lanes, etc.) is judged incorrectly

●

When a sign is immediately after a freeway 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 compatible sign is detected as a system compatible
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 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
navigation system display may differ.

■

Customize settings

The settings of the RSA system can be changed through customize settings.

Notification function

In the following situations, the RSA system will output a warning to notify the driver.

●

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

●

When the RSA system detects a do not enter sign and determines that the
vehicle has entered a no-entry area, the do not enter sign displayed on the
multi-information display will flash and a buzzer will sound.

Types of road signs supported

●

The following types of road signs can be displayed.

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

6-2. Using the safe driving support functions

511

Driving suppor

t s

ystem

Speed limit

Do Not Enter

No U-turn

No Turn On Red

Stop

Yield

Warning

●

Depending on the specifications of the vehicle, signs may be displayed overlap-
ping.

Duplicate display example

Changing RSA settings

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

→

P.774

6-2. Using the safe driving support functions

512

Dynamic radar cruise control

This dynamic radar cruise control uses radar to detect the presence of vehicles
ahead, determines the current vehicle-to-vehicle distance, and operates to main-
tain a suitable distance from the vehicle ahead. The desired vehicle-to-vehicle
distance can be set by operating the vehicle-to-vehicle distance switch.
Use the dynamic radar cruise control only on highways and expressways.

WARNING

■

For safe use

●

Driving safely is solely the responsibility 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 provides 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.517

●

Set the speed appropriately according to the speed limit, traffic flow, road conditions,
weather conditions, etc. The driver is responsible for confirming the set speed.

●

Even if the system is operating correctly, 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 systems

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 determining
the distance between the driver’s own vehicle and a designated preceding vehicle. 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.

●

Details of support provided for the driver’s judgement

6-2. Using the safe driving support functions

513

Driving suppor

t s

ystem

WARNING

The dynamic radar cruise control determines 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 vigilant 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 appropriate control, using it may lead to an accident resulting in
death or serious injury.

●

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.376

●

Situations in which the lane may not be detected:

→

P.371

Basic functions

6-2. Using the safe driving support functions

514

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
decelerates 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 vehicle-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:

Vehicles without a head-up display: If a preceding vehicle stops, the vehicle will also
stop (controlled stop). After the preceding 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 controlled stop will continue.
Vehicles with a head-up display: If a preceding vehicle stops, the vehicle will also stop
(controlled stop). After the preceding vehicle starts off, pressing the [ + ] switch or
depressing the accelerator pedal will resume follow-up cruising (start off operation). If
a start off operation is not performed, the controlled stop will continue.

INFORMATION

■

Operating conditions

●

The shift position is in D.

●

The desired set speed can be set when the vehicle speed is approximately 20 mph
(30 km/h) or more.
(If the vehicle speed is set while driving at below approximately 20 mph [30 km/h],
the set speed will be set to approximately 20 mph [30 km/h].)

■

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

6-2. Using the safe driving support functions

515

Driving suppor

t s

ystem

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

●

Vehicles without a head-up display: When the [+RES] switch is pressed while the
vehicle is stopped by system control, if the preceding vehicle starts off within approxi-
mately 3 seconds, follow-up cruising will resume.
Vehicles with a head-up display: 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, follow-up cruising will resume.

■

Automatic cancellation of vehicle-to-vehicle distance control mode

In the following situations, vehicle-to-vehicle distance control mode will be canceled
automatically:

●

When the brake control or output restriction control of a driving support system
operates (For example: Pre-Collision System, drive-start control)

●

When the parking brake has been operated

●

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

●

Situations in which some or all of the functions of the system cannot operate:

→

P.378

■

Dynamic radar cruise control system warning messages and buzzers

For safe use:

→

P.371

■

Preceding vehicles that the sensor may not detect correctly

In the following situations, depending on the conditions, if the system cannot provide suffi-
cient deceleration or acceleration is necessary, 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.521)

may not operate.

●

When a vehicle cuts in front of your vehicle 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

6-2. Using the safe driving support functions

516

●

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, depending on
the situation) as necessary.
As the sensor may not be able to correctly detect a vehicle, the system may not operate
properly.

●

When a preceding vehicle brakes suddenly

●

When changing lanes at low speeds, such as in a traffic jam

System components

■

Meter display

Multi-information display

Set vehicle speed

Indicators

■

Switches

▶

Vehicles without a head-up display

Driving assist mode select switch

Driving assist switch

[+RES] switch

[ - ] switch

Cancel switch

Vehicle-to-vehicle distance switch

6-2. Using the safe driving support functions

517

Driving suppor

t s

ystem

▶

Vehicles with a head-up display

The function of each switch differs depend-
ing 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

Vehicle-to-vehicle distance switch

Cancel switch

Using the dynamic radar cruise control

Setting the vehicle speed

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

The dynamic radar cruise control indicator will il-
luminate.

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

518

Using the accelerator pedal, accelerate or
decelerate to the desired vehicle speed (ap-
proximately 20 mph [30 km/h] 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 re-
leased will be the set vehicle speed.

Adjusting the set vehicle speed

■

Adjusting the set vehicle speed using the switches

●

Vehicles without a head-up display: To change the set vehicle speed, press the
[+RES]or [ - ] switch until the desired speed is displayed.Vehicles with a head-up
display: To change the set vehicle speed, press the[ + ] or [ - ] switch until the
desired speed is displayed.

▶

Vehicles without a head-up display:

▶

Vehicles with a head-up display:

▶

Vehicles without a head-up

display

▶

Vehicles with a head display

6-2. Using the safe driving support functions

519

Driving suppor

t s

ystem

Increase set vehicle speed

Decrease set vehicle speed

Short press adjustment (IN DISPUTE): Press the switch
Press and hold adjustment (IN DISPUTE): Press and hold the switch until the desired
set vehicle speed is reached.

The set vehicle speed will increase or decrease as follows:

●

For U.S.A.

Short press adjustment (IN DISPUTE): Increases or decreases by 1 mph (1.6
km/h) each time the switch is pressed
Press and hold adjustment (IN DISPUTE): Increases or decreases in 1 mph
(1.6 km/h) increments continuously while the switch is pressed and held

●

Except for U.S.A.

Short press adjustment (IN DISPUTE): By 1 km/h (0.6 mph) or 1 mph (1.6
km/h) each time the switch is pressed
Press and hold adjustment (IN DISPUTE): 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

■

Increasing the set vehicle speed using the accelerator pedal

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

Vehicles without a head-up display: Press the [+RES] switch.Vehicles with a
head-up display: Press the[ + ] switch.

Canceling/resuming control

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

Control will also be canceled if the brake pedal is
depressed.
(If the vehicle has been stopped by system control,
depressing the brake pedal will not cancel con-
trol.)

Vehicles without a head-up display: Press the [+RES] switch to resume con-
trol.Vehicles with a head-up display: Press the [RES] switch to resume control.

▶

Vehicles without a head-up

display

6-2. Using the safe driving support functions

520

Changing the vehicle-to-vehicle distance

●

Each time the switch is pressed, the vehicle-to-
vehicle distance setting will change as follows:

If a preceding vehicle is detected, the preceding
vehicle mark will be displayed.

Illustra-
tion
Number

Vehicle-to-
vehicle dis-
tance

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

Long

Approximately 200 ft
(60 m)

Medium
(Long)

Approximately 145 ft (45
m)

Medium
(Short)

Approximately 100 ft
(30 m)

Short

Approximately 85 ft (25
m)

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.

Approach warning

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 vehicle-to-vehicle distance.

■

Warnings may not occur when

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

●

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

▶

Vehicles with a head-up dis-

play

▶

Vehicles without a head-up

display

▶

Vehicles with a head-up dis-

play

6-2. Using the safe driving support functions

521

Driving suppor

t s

ystem

●

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

Curve speed reduction function

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 distance control
needs to operate, such as when a preceding vehicle
cuts in front of your vehicle, the curve speed reduction
function will be canceled.

INFORMATION

■

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

■

Changing the settings of the curve speed reduction function

Various settings of the curve speed reduction function can be changed through custom-
ize settings.

(

→

P.774)

Support for lane change

If your vehicle is being driven at approximately 50 mph (80 km/h) 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.

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 signal lever is operated to the right.)

6-2. Using the safe driving support functions

522

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.

6-2. Using the safe driving support functions

523

Driving suppor

t s

ystem

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 highways and expressways

WARNING

■

For safe use

●

Driving safely is solely the responsibility 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 driving safely.

●

Set the speed appropriately according to the speed limit, traffic flow, road conditions,
weather conditions, etc. The driver is responsible for confirming the set speed.

■

Situations in which cruise control should not be used

Do not use the cruise control in the following 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 covered 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 system:

→

P.371

System Components

■

Meter display

Set vehicle speed

Cruise control indicator

6-2. Using the safe driving support functions

524

■

Switches

▶

Vehicles without a head-up display:

Driving assist mode select switch

Driving assist switch

[+RES]switch

[ - ]switch

Cancel switch

▶

Vehicles with a head-up display:

The function of each switch differs depend-
ing 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

Using the cruise control

Setting the vehicle speed

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

The cruise control indicator will illuminate.

▶

Vehicles without a head-up

display

6-2. Using the safe driving support functions

525

Driving suppor

t s

ystem

Content .. 29 30 31 32 ..