Volvo V90 (2021 year). Manual in english - page 20

DRIVER SUPPORT

* Option/accessory.

343

Steering assistance at risk of

collision

The 

Collision avoidance

 function can help

the driver reduce the risk of the vehicle leav-
ing its lane unintentionally and/or colliding
with another vehicle or obstacle by actively
steering the vehicle back into its lane and/or
swerving.

The function consists of these subfunctions:

•

Run-Off Mitigation with steering assis-
tance

•

Steering assistance during collision risks
from oncoming traffic

•

Steering assistance during collision risks
from behind

*

After the system has automatically intervened,
this text message will appear in the instru-
ment panel:

Collision avoidance

 – 

Automatic

intervention

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

NOTE

It is always the driver who must decide
how much the vehicle should be in control
– the vehicle can never take command.

Related information

•

Driver support systems (p. 276)

•

Activating or deactivating steering assis-
tance during collision risks (p. 344)

•

Run-Off Mitigation with steering assis-
tance (p. 344)

•

Steering assistance during collision risks
from oncoming traffic (p. 345)

•

Steering assistance during collision risks
from behind

*

 (p. 346)

•

Steering assistance during collision risks
limitations (p. 347)

•

Symbols and messages for steering assis-
tance during collision risks (p. 348)

DRIVER SUPPORT

* Option/accessory.

344

Activating or deactivating steering

assistance during collision risks

The steering assistance function is optional –
the driver can choose to have it activated or
deactivated.

Activate or deactivate the
function using this button in
the center display's Function
view.

•

GREEN button indicator light – the func-
tion is activated.

•

GRAY button indicator light – the function
is deactivated.

The function is automatically activated each
time the engine is started

83

.

NOTE

When the 

Collision avoidance

 function is

deactivated, all subfunctions of the follow-
ing are deactivated:

•

Steering assistance at risk of run-off

•

Steering assistance at risk of head-on
collision

•

Steering assistance during collision
risks from behind

*

Although it is possible to deactivate the
function, the driver is advised to keep it
activated since it can help improve driving
safety in most cases.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

Steering assistance during collision risks
limitations (p. 347)

Run-Off Mitigation with steering

assistance

Steering assistance has several sub-func-
tions. Run-Off Mitigation with steering assis-
tance can help the driver and reduce the risk
of the vehicle inadvertently running off the
road by actively steering the vehicle back
onto the road.

This function has two activation levels for
intervention:

•

Steering assistance only

•

Steering assistance with braking

Steering assistance only

Intervention with steering assistance

83

On some markets, the setting that was active when the engine was switched off is reactivated.

DRIVER SUPPORT

}}

345

Steering assistance with braking

Intervention with steering assistance and braking

Braking intervention assists in situations
where steering assistance alone is not suffi-
cient. Braking force is automatically adapted
according to the situation at the moment the
vehicle begins to run off the road.

The function is active at speeds between
65-140 km/h (40-87 mph) on roads with
clearly visible traffic lane markings/lines.

The system uses a camera to monitor the
edges of the road and the painted side marker
lines. If the vehicle is about to cross the edge
of the road, the function will attempt to steer
the vehicle back onto the road. If this is not
sufficient to keep the vehicle on the road, the
brakes will also be applied.

However, the function will 

not

 provide either

steering assistance or braking if the turn signal

is used. The function will also not be activated
if it detects that the driver is actively operating
the vehicle.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

Steering assistance during collision risks
limitations (p. 347)

Steering assistance during

collision risks from oncoming

traffic

Steering assistance has several sub-func-
tions. Steering assistance during collision
risks from oncoming traffic can help a dis-
tracted driver who has not noticed that the
vehicle is veering out of the lane.

The function provides assistance by swerving your

vehicle back into your own lane.

Oncoming vehicles

Own vehicle

When steering assistance is activated, colli-
sion warning for driver support will also be
activated. However, the brake pedal pulsa-
tions that are part of collision warning will not
be activated.

||

DRIVER SUPPORT

* Option/accessory.

346

The function is active at speeds between
60-140 km/h (37-87 mph) on roads with
clearly visible traffic lane markings/lines.

If your vehicle is starting to veer from your
own lane and a vehicle is approaching from
the opposite direction, this function can help
the driver steer the vehicle back into its own
lane.

However, the function will 

not

 provide steer-

ing assistance if the turn signal is used. The
function will also not be activated if it detects
that the driver is actively operating the vehicle.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

Collision risk warning from driver support
(p. 317)

•

Steering assistance during collision risks
limitations (p. 347)

Steering assistance during

collision risks from behind

*

Steering assistance has several sub-func-
tions. If you become distracted and do not
notice your vehicle starting to veer out of the
lane while another vehicle is approaching
from behind or is in your vehicle's blind spot,
Steering assistance during collision risks
from behind can help provide assistance.

The function provides assistance by steering your

vehicle back into your own lane.

Another vehicle in blind spot zone

Own vehicle

If your vehicle is beginning to veer out of your
lane while another vehicle is in your blind spot
or another vehicle is rapidly approaching in the

next lane, this function can help the driver
steer the vehicle back into its own lane.

Even if the driver intentionally changes lanes
using a turn signal without noticing another
vehicle approaching, the function can provide
assistance.

The function is active at speeds between
60-140 km/h (37-87 mph) on roads with
clearly visible traffic lane markings/lines.

The lights in the door mirrors will flash while
steering assistance is being provided, whether
or not the BLIS

84

 function is activated. An

audible signal will also sound.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

BLIS

*

 (p. 350)

•

Steering assistance during collision risks
limitations (p. 347)

84

Blind Spot Information

DRIVER SUPPORT

* Option/accessory.

347

Steering assistance during

collision risks limitations

The function may have limited functionality in
certain situations and not intervene, e.g.:

•

for smaller vehicles such as motorcycles

•

if more than half of your vehicle has
moved into the adjacent lane

•

on roads/lanes with indistinct or no side
lane markings

•

outside the speed range 60-140 km/h
(37-87 mph)

•

when speed-dependent power steering
wheel resistance is working at reduced
power – e.g. during cooling due to over-
heating.

Functionality may also be reduced in other sit-
uations, such as:

•

road work

•

winter driving conditions

•

narrow roads

•

poor road surfaces

•

a very sporty driving style

•

bad weather with reduced visibility.

In these demanding driving conditions, the
function may not be able to properly assist the
driver. In these situations, it is recommended
that it is turned off.

NOTE

The function uses the vehicle's camera and
radar sensor, which has certain general
limitations.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

Run-Off Mitigation with steering assis-
tance (p. 344)

•

Steering assistance during collision risks
from oncoming traffic (p. 345)

•

Steering assistance during collision risks
from behind

*

 (p. 346)

DRIVER SUPPORT

348

Symbols and messages for

steering assistance during collision

risks

A number of symbols and messages related
to steering assistance may be displayed in

the instrument panel. Several examples are
provided below.

Symbol

Message

Meaning

Collision avoidance

Automatic intervention

When the function is activated, a message will appear to alert the driver.

Windscreen sensor

Sensor blocked, see Owner's manual

The camera's ability to detect the lane in front of the vehicle is reduced.

A text message can be erased by briefly press-
ing the 

 button in the center of the right-

side steering wheel keypad.

If the message persists: Contact a workshop 

‒

an authorized Volvo workshop is recom-
mended.

Related information

•

Steering assistance at risk of collision
(p. 343)

•

Steering assistance during collision risks
limitations (p. 347)

DRIVER SUPPORT

}}

* Option/accessory.

349

Rear Collision Warning

*

85

The Rear Collision Warning

86

 (RCW) function

can help the driver avoid rear-end collisions
from vehicles approaching from behind.

The function can alert drivers of following vehi-
cles of the risk of a collision by rapidly flashing
the turn signals.

If, at a speed below 30 km/h (20 mph), the
function detects that the vehicle is in danger
of being hit from behind, the seat belt tension-
ers may tension the front seat belts. The
Whiplash Protection System will also be acti-
vated in a collision.

Immediately before a collision from behind,
the function may also activate the brakes in
order to reduce the forward acceleration of the
vehicle during the collision. However, the
brakes will only be applied if your vehicle is
stationary. The brakes will be immediately
released if the accelerator pedal is depressed.

The function is automatically activated each
time the engine is started.

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

Related information

•

Driver support systems (p. 276)

•

Rear Collision Warning

*

 limitations

(p. 349)

•

Whiplash Protection System (p. 48)

Rear Collision Warning

*

87

limitations

In some situations, it may be difficult for Rear
Collision Warning (RCW) to warn the driver
of a collision risk.

This may be the case if:

•

the vehicle approaching from the rear is
detected at a late stage

•

the vehicle approaching from the rear
changes lanes at a late stage

•

a trailer, bicycle holder or similar is con-
nected to the vehicle's electrical system -
the function will then be automatically
deactivated.

NOTE

In certain markets RCW does 

not

 warn

with the direction indicators due to local
traffic regulations – in such cases, that part
of the function is deactivated.

NOTE

The function uses the vehicle's camera and
radar sensor, which has certain general
limitations.

85

Warning of collision from the rear.

86

This function is not available on all markets.

87

Warning of collision from the rear.

||

DRIVER SUPPORT

* Option/accessory.

350

Related information

•

Rear Collision Warning

*

 (p. 349)

•

Setting a warning distance for City Safety
(p. 332)

•

Camera/radar sensor limitations (p. 388)

BLIS

*

The BLIS

88

 function is designed to help pro-

vide assistance in heavy traffic with several
lanes moving in the same direction by helping
the driver to detect the presence of vehicles
in the "blind spot" area behind and to the side
of the vehicle.

Location of BLIS indicator light

BLIS is a driver support system designed to
alert the driver of:

•

vehicles in your "blind spot"

•

vehicles approaching rapidly in adjacent
lanes.

BLIS overview

Blind spot zone

Rapidly approaching vehicle zone

The system is designed to react to:

•

vehicles passing your vehicle

•

vehicles that are rapidly approaching your
vehicle from behind.

When BLIS detects a vehicle in zone 1 or a
rapidly approaching vehicle in zone 2, an indi-
cator light will illuminate in the relevant rear-
view mirror and glow steadily. If the driver
then uses the turn signal on the side in which
the warning has been given, the indicator light
will become brighter and begin flashing.

BLIS is active when your vehicle is traveling at
a speed over 10 km/h (6 mph).

88

Blind Spot Information

DRIVER SUPPORT

* Option/accessory.

351

If a passing vehicle's speed is more than
15 km/h (9 mph) faster than your vehicle, BLIS
will not react.

NOTE

The light illuminates on the side of the
vehicle where the system has detected the
vehicle. If the vehicle is passed on both
sides simultaneously, both lights come on.

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

Related information

•

Driver support systems (p. 276)

•

Activating or deactivating BLIS (p. 351)

•

BLIS limitations (p. 352)

•

BLIS messages (p. 353)

Activating or deactivating BLIS

The BLIS

89

 function can be activated or deac-

tivated.

Activate or deactivate the
function using this button in
the center display's Function
view.

•

GREEN button indicator light – the func-
tion is activated.

•

GRAY button indicator light – the function
is deactivated.

If BLIS is activated when the engine is started,
the indicator lights in the rearview mirrors will
flash once.

If BLIS is deactivated when the engine is
turned off, it will remain off the next time the
engine is started and the indicator lights will
not illuminate.

Related information

•

BLIS

*

 (p. 350)

•

BLIS limitations (p. 352)

89

Blind Spot Information

DRIVER SUPPORT

* Option/accessory.

352

BLIS limitations

BLIS

90

 functionality may be reduced in cer-

tain situations.

Keep the marked area clean (on both the left and
right sides of the vehicle)

91

.

Examples of limitations:

•

Dirt, ice and snow covering the sensors
may reduce functionality and prevent the
system from providing warnings.

•

The BLIS function is automatically deacti-
vated if a trailer, bicycle holder or similar is
connected to the vehicle's electrical sys-
tem.

•

For BLIS to function effectively, bicycle
holders, luggage racks or similar should
not be mounted on the vehicle's towbar.

WARNING

•

BLIS does not work in sharp curves.

•

BLIS does not work when the vehicle
is being reversed.

NOTE

The function uses the vehicle's radar sen-
sors, which have certain general limita-
tions.

Related information

•

BLIS

*

 (p. 350)

•

Camera/radar sensor limitations (p. 388)

90

Blind Spot Information

91

Note: This illustration is general and details may vary depending on model.

DRIVER SUPPORT

* Option/accessory.

353

BLIS messages

A number of messages related to BLIS

92

 may

be displayed in the instrument panel. Several
examples are provided below.

Message

Meaning

Blind spot sensor

Service required

The system is not functioning as intended. Contact a workshop

A

.

Blind spot system off

Trailer attached

BLIS and CTA 

B

 have been deactivated because a trailer has been connected to the vehicle's electrical system.

A

An authorized Volvo workshop is recommended.

B

Cross Traffic Alert

*

A text message can be erased by briefly press-
ing the 

 button in the center of the right-

side steering wheel keypad.

If a message cannot be erased, contact a
workshop

A

.

Related information

•

BLIS

*

 (p. 350)

•

Cross Traffic Alert

*

 (p. 358)

92

Blind Spot Information

DRIVER SUPPORT

* Option/accessory.

354

Driver Alert Control

The Driver Alert Control (DAC) function is
designed to help alert the driver to erratic
behavior, e.g. if the driver is distracted or
showing signs of fatigue.

The objective of the function is to detect
slowly deteriorating driving behavior and is
primarily intended to be used on major roads.
The function is not intended for use in city traf-
fic.

DAC is activated when the vehicle's speed
exceeds 65 km/h (40 mph) and remains
active as long as speeds are above 60 km/h
(37 mph).

Driver Alert Control detects the vehicle's position in

the traffic lane.

A camera monitors the traffic lane's marker
lines and compares the direction of the road

with the driver's movements of the steering
wheel.

The vehicle is moving erratically in the lane.

If driving behavior becomes
considerably erratic, the
driver will be alerted by this
symbol in the instrument
panel, an audible signal and
the message 

Time for a

break

.

If the vehicle is equipped with Sensus
Navigation

*

 and the 

Rest Stop Guidance

function is activated, suggestions will also be
provided for suitable places to take a break.

The warning will be repeated after a short time
if driving behavior does not improve.

WARNING

Driver Alert Control must not be used to

extend a period of driving. The driver

should plan in breaks at regular intervals

and make sure they are well rested.

WARNING

An alarm from Driver Alert Control should

be taken very seriously since a sleepy driver

is often not aware of their own condition.
If the alarm sounds or you feel fatigued:

•

Stop the vehicle safely as soon as pos-
sible and rest.

Studies have shown that it is just as dan-

gerous to drive while tired as it is to drive

under the influence of alcohol or other

stimulants.

DRIVER SUPPORT

* Option/accessory.

355

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

Related information

•

Driver support systems (p. 276)

•

Activating or deactivating Driver Alert
Control (p. 355)

•

Selecting guidance to a rest area if the
Driver Alert Control warning has been
given (p. 355)

•

Driver Alert Control limitations (p. 356)

Activating or deactivating Driver

Alert Control

The Driver Alert Control (DAC) function can
be activated or deactivated.

1. Tap 

Settings

 in the center display's Top

view.

2. Select 

My Car

IntelliSafe

Driver

Alert

.

3. Select/deselect 

Alertness Warning

 to

activate/deactivate the function.

Related information

•

Driver Alert Control (p. 354)

•

Driver Alert Control limitations (p. 356)

Selecting guidance to a rest area if

the Driver Alert Control warning

has been given

In vehicles equipped with Sensus
Navigation

*

, the driver can activate a guide

that can automatically suggest a suitable rest
stop if the Driver Alert Control (DAC) warning
is given.

The 

Rest Stop Guidance

 function can be

switched on or off.

1. Tap 

Settings

 in the center display's Top

view.

2. Select 

My Car

IntelliSafe

Driver

Alert

.

3. Select/deselect 

Rest Stop Guidance

 to

activate/deactivate the function.

Related information

•

Driver Alert Control (p. 354)

•

Driver Alert Control limitations (p. 356)

DRIVER SUPPORT

* Option/accessory.

356

Driver Alert Control limitations

Driver Alert Control (DAC) functionality may
be reduced in certain situations.

In certain situations, the system may provide a
warning even if it has not detected a change in
driving behavior, e.g.:

•

in strong crosswinds

•

on grooved road surfaces.

WARNING

In certain cases, driving behavior might not

be affected despite the driver's fatigue –

when using the Pilot Assist

*

 function –

resulting in the driver not getting a warning

from DAC.
It is therefore very important to always

stop and take a break at the slightest sign

of fatigue, regardless of whether the func-

tion has issued a warning or not.

NOTE

The function uses the vehicle's camera and
radar sensor, which has certain general
limitations.

Related information

•

Driver Alert Control (p. 354)

•

Camera/radar sensor limitations (p. 388)

Distance Alert

*

93

The Distance Alert function can help the
driver become aware if the time interval to
the vehicle in front is too short. The vehicle
must be equipped with a head-up display

*

 in

order to display Distance Alert.

Symbol for Distance Alert on the windshield with

head-up display

In vehicles equipped with a head-up display, a
symbol will be displayed on the windshield as
long as the time interval to the vehicle ahead
is shorter than the set time interval. However,
the 

Show Driver Support

 function must be

activated under Settings in the vehicle's menu
system.

Distance Alert is active at speeds
above 30 km/h (20 mph) and only reacts for

vehicles ahead moving in the same direction
as your vehicle. No distance information is
provided for oncoming, slow-moving or sta-
tionary vehicles.

NOTE

Visual warnings on the windshield may be
difficult to notice in cases of strong sun-
light, reflections, extreme light contrasts,
or if the driver is wearing sunglasses or is
not looking straight ahead.

NOTE

Distance Alert is deactivated while Adap-
tive Cruise Control

*

 or Pilot Assist

*

 is

active.

WARNING

Distance Alert only reacts of the time inter-

val to the vehicle ahead is shorter than the

preset value – vehicle speed is not affec-

ted.

93

Distance Alert

DRIVER SUPPORT

* Option/accessory.

357

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

Related information

•

Activating or deactivating Distance Alert
(p. 357)

•

Distance Alert limitations (p. 357)

•

Setting time interval to the vehicle ahead
(p. 320)

•

Collision risk warning from driver support
(p. 317)

•

Head-up display

*

 (p. 146)

Activating or deactivating Distance

Alert

94

Distance Alert can be turned off. The function
is only available in vehicles that can display
information on the windshield with a head-up
display

*

.

Activate or deactivate the
function using this button in
the center display's Function
view.

•

GREEN button indicator light – the func-
tion is activated.

•

GRAY button indicator light – the function
is deactivated.

Distance Alert is automatically activated each
time the engine is started.

Related information

•

Distance Alert

*

 (p. 356)

•

Distance Alert limitations (p. 357)

Distance Alert limitations

95

Distance Alert functionality may be reduced
in certain situations. The function is only
available in vehicles that can display informa-
tion on the windshield with a head-up dis-
play

*

.

WARNING

•

Detection ability may be affected by
vehicle size, e.g. motorcycles, which
can cause the warning light to come on
at a shorter time interval than that set
or cause the warning to be temporarily
absent.

•

Very high speeds can cause the light to
come on at a shorter time interval than
that set due to limitations in the range
of the radar unit.

NOTE

The function uses the vehicle's camera and
radar sensor, which has certain general
limitations.

Related information

•

Distance Alert

*

 (p. 356)

•

Camera/radar sensor limitations (p. 388)

•

Head-up display

*

 (p. 146)

DRIVER SUPPORT

* Option/accessory.

358

Cross Traffic Alert

*

96

Cross Traffic Alert(CTA) is a supplementary
driver support system to BLIS

97

 that is

intended to help the driver detect vehicles
crossing behind the vehicle while backing up.

The 

auto-brake

 subfunction can help the

driver stop the car if there is a risk of collision
with an unobserved vehicle.

Examples of areas in which Cross Traffic Alert can

help the driver detect obstacles while backing up.

The function is primarily designed to detect
vehicles, but in certain cases can also detect
pedestrians or smaller objects such as bicy-
cles.

The function is only active when the vehicle is
moving backward or reverse gear is engaged.

If the function detects that something is
approaching your vehicle from the side:

•

an audible signal will sound from either
the left or right speaker, depending on
which side of your vehicle the object is
approaching from.

•

an icon will illuminate in the 

Park Assist

System

 graphic on the screen.

•

an icon will appear in the Park Assist Cam-
era's Top view.

Illuminated Cross Traffic Alert icon in the 

Park

Assist System

 graphic on the screen.

If the driver does not pay attention to the
warning from the function and a collision is
unavoidable, the 

auto brake

 function will

intervene to stop the vehicle and a text will be
shown on the instrument panel to explain why
the vehicle was braked.

WARNING

•

The function is supplementary driver
support intended to facilitate driving
and help make it safer – it cannot han-
dle all situations in all traffic, weather
and road conditions.

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgment. The driver is always respon-
sible for ensuring the vehicle is driven
in a safe manner, at the appropriate
speed, with an appropriate distance to
other vehicles, and in accordance with
current traffic rules and regulations.

94

Distance Alert

95

Distance Alert

96

Warning for crossing traffic when the vehicle is backing up.

97

Blind Spot Information