Volvo S90 Twin Engine (2020 year). Manual in english — page 22

DRIVER SUPPORT

* Option/accessory.

372

Driver Alert Control

The Driver Alert Control (DAC) function is
intended to help make the driver aware that
he or she is starting to drive less consistently,
e.g. if the driver becomes distracted or starts
to fall asleep.

The objective for DAC is to detect slowly dete-
riorating driving ability and it is primarily
intended for major roads. The function is not
intended for city traffic.

The function is activated when speed exceeds
65 km/h (40 mph) and remains active as long
as the speed is over 60 km/h (37 mph).

DAC reads the position of the car in the lane.

A camera detects the edge markings painted
on the carriageway and compares the align-
ment of the road with the driver’s steering
wheel movements.

The car is being driven erratically in the lane.

If driving behaviour becomes
noticeably inconsistent, the
driver is alerted by this sym-
bol in the driver display, com-
bined with an acoustic signal
and the text message

Time

to take a break

.

If the car is equipped with Sensus Navigation

*

and has the function

Rest Stop Guidance

activated, suggestions for an appropriate
place for a break are also displayed.

The warning is repeated after a time if driving
behaviour has not improved.

WARNING

Driver Alert Control should not be used to

extend a period of driving. The driver

should instead plan for breaks at regular

intervals and make sure they are well

rested.

WARNING

An alarm from Driver Alert Control should

be taken very seriously, as a sleepy driver is

often not aware of his/her own condition.
If the alarm sounds or you feel fatigued:

•

Stop the car safely as soon as possible
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.

373

WARNING

•

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

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgement. The driver is always
responsible for ensuring the car is
driven in a safe manner, at the appro-
priate speed, with an appropriate dis-
tance to other vehicles, and in accord-
ance with current traffic rules and reg-
ulations.

Related information

•

Driving support systems (p. 280)

•

Activating or deactivating Driver Alert
Control (p. 373)

•

Select rest stop guidance in the event of a
warning from Driver Alert Control (p. 373)

•

Limitations of Driver Alert Control
(p. 374)

Activating or deactivating Driver

Alert Control

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

1. Tap on

Settings

in the centre display's

top view.

2. Select

My Car

IntelliSafe

Driver

Alert Control

.

3. Select or deselect

Alertness Warning

to

activate or deactivate the function.

Related information

•

Driver Alert Control (p. 372)

•

Limitations of Driver Alert Control
(p. 374)

Select rest stop guidance in the

event of a warning from Driver

Alert Control

In cars equipped with Sensus Navigation

*

,

the driver can activate a guide that can auto-
matically suggest an appropriate rest area
when Driver Alert Control (DAC) issues a
warning.

It is possible to select whether the

Rest Stop

Guidance

function should be activated or

deactivated.

1. Tap on

Settings

in the centre display's

top view.

2. Select

My Car

IntelliSafe

Driver

Alert Control

.

3. Select or deselect

Rest Stop Guidance

to activate or deactivate the function.

Related information

•

Driver Alert Control (p. 372)

•

Limitations of Driver Alert Control
(p. 374)

DRIVER SUPPORT

* Option/accessory.

374

Limitations of Driver Alert Control

The Driver Alert Control (DAC) function may
have limitations in certain situations.

In some cases the system may issue a warn-
ing despite driving ability not deteriorating, for
example:

•

in strong side winds

•

on rutted road surfaces.

WARNING

In some cases, driving behaviour is not

affected despite driver fatigue – e.g. when

using the Pilot Assist

*

function – resulting

in the driver not getting a warning from

DAC.
It is therefore important to always stop and

take a break at the slightest feeling of fati-

gue, regardless of whether the function has

given a warning.

NOTE

This function uses the car's camera and
radar units, which have certain general lim-
itations.

Related information

•

Driver Alert Control (p. 372)

•

Limitations for camera and radar unit
(p. 337)

Lane assistance

The function of the Lane Keeping Aid
(LKA

106

) is to help the driver to reduce the

risk of the car accidentally leaving its own
lane on motorways and similar major routes.

Lane Keeping Aid steers the car back into its
lane and/or alerts the driver with vibrations in
the steering wheel.

Lane Keeping Aid is active within the speed
range 65–200 km/h (40–125 mph) on roads
with clearly visible side lines.

On narrow roads the function may be unavail-
able, in which case it goes into standby mode.
The function becomes available again when
the road is wide enough.

A camera reads the side lines of the road/lane.

Lane assistance steers the car back into its lane.

Lane assistance warns with steering wheel vibra-

tions.

106

Lane Keeping Aid

DRIVER SUPPORT

}}

375

Depending on settings, lane assistance acts in
accordance with the following:

•

Assist

activated: When the car is

approaching a lane line, the function will
actively steer the car back into its lane by
applying a slight torque to the steering
wheel.

•

Warning

activated: If the car is about to

cross a lane line, the driver is warned by
means of vibrations in the steering wheel.

There is also an option where both steering
assistance and warning are activated simulta-
neously.

NOTE

When a direction indicator/flasher is
switched on, there are no steering correc-
tions or alerts from lane assistance.

WARNING

•

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

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgement. The driver is always
responsible for ensuring the car is
driven in a safe manner, at the appro-
priate speed, with an appropriate dis-
tance to other vehicles, and in accord-
ance with current traffic rules and reg-
ulations.

Lane assistance does not intervene

Lane assistance does not engage on sharp inside

curves.

In some situations, lane assistance allows lane
lines to be crossed without intervening with
either steering assistance or a warning – e.g.
when using the direction indicators or cutting
bends.

Hands on the steering wheel

For steering assistance with lane assistance to
work, the driver must have his/her hands on
the steering wheel, which the system will con-
tinue to monitor.

If the driver does not keep
his/her hands on the steering
wheel, a warning signal is
heard and a message encour-
ages the driver to steer the
car actively:

||

DRIVER SUPPORT

376

•

Lane Keeping Aid

Apply steering

If the driver follows the prompt to start steer-
ing, the function is set in standby mode and
this message is shown:

•

Lane Keeping Aid

Standby until

steering applied

The function will then be unavailable until the
driver starts to steer the car again.

Related information

•

Driving support systems (p. 280)

•

Activating or deactivating lane assistance
(p. 376)

•

Limitations of Lane assistance (p. 377)

•

Symbols and messages for lane assis-
tance (p. 378)

Activating or deactivating lane

assistance

The Lane Keeping Aid (LKA) function (LKA

107

)

is optional – the driver can choose to activate
or deactivate this function.

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

•

GREEN button indication – the function is
activated.

•

GREY button indication – the function is
deactivated.

Related information

•

Lane assistance (p. 374)

•

Selecting assistance option for lane assis-
tance (p. 376)

•

Limitations of Lane assistance (p. 377)

Selecting assistance option for

lane assistance

The driver can select how the Lane Keeping
Aid (LKA

108

) should react if the car leaves its

lane.

1. Select

Settings

My Car

IntelliSafe

in the centre display's top view.

2. In the event of

Lane Keeping Aid Mode

,

select how the function should react:

•

Assist

– the driver is given steering

assistance without a warning.

•

Both

– the driver is given a warning

both from the steering wheel vibrating
and from steering assistance.

•

Warning

– the driver is only warned by

steering wheel vibration.

Related information

•

Lane assistance (p. 374)

107

Lane Keeping Aid

108

Lane Keeping Aid

DRIVER SUPPORT

377

Limitations of Lane assistance

In certain demanding conditions lane assis-
tance (LKA

109

) may have difficulty helping the

driver correctly. In such cases it is recom-
mended to switch off this function.

Examples of such conditions are:

•

road works

•

winter road conditions

•

poor road surface

•

a very “sporty” driving style

•

poor weather with reduced visibility

•

roads with unclear or non-existent side
markings

•

sharp edges or lines other than the lane's
side markings

•

as the steering servo for speed-dependent
steering wheel resistance is working at
reduced power – e.g. when cooling due to
overheating.

The function is unable to detect barriers, rails
or similar obstacles at the side of the carriage-
way.

NOTE

This function uses the car's camera and
radar units, which have certain general lim-
itations.

Related information

•

Lane assistance (p. 374)

•

Speed-dependent steering force (p. 280)

•

Limitations for camera and radar unit
(p. 337)

109

Lane Keeping Aid

DRIVER SUPPORT

378

Symbols and messages for lane

assistance

A number of symbols and messages regar-
ding lane assistance (LKA

110

) can be shown

on the driver display. Here are some exam-
ples.

Symbol

Message

Specification

Driver support system

Reduced functionality Service required

The system does not function as it should. A workshop should be contacted

A

.

Windscreen sensor

Sensor blocked, see Owner's manual

The ability of the camera to scan the roadway in front of the car is reduced.

Lane Keeping Aid

Apply steering

The LKA steering assistance does not function if the driver does not have his/her
hands on the steering wheel. Follow the instruction and steer the car.

Lane Keeping Aid

Standby until steering applied

LKA is set in standby mode until the driver starts to steer the car again.

A

An authorised Volvo workshop is recommended.

110

Lane Keeping Aid

DRIVER SUPPORT

379

A text message can be cleared by briefly
pressing the

button, located in the centre

of the steering wheel's right-hand keypad.

If a message persists, contact a workshop

A

.

Related information

•

Lane assistance (p. 374)

•

Display mode for lane assistance (p. 380)

•

Limitations of Lane assistance (p. 377)

DRIVER SUPPORT

380

Display mode for lane assistance

Lane assistance (LKA

111

) is visualised by sym-

bols in the driver display depending on the
situation.

Here are some examples of
symbols and the situations in
which they are shown:

Available

Available — the lane lines in the symbol are WHITE.

Lane assistance is scanning one or both lane
lines.

Unavailable

Unavailable — the lane lines in the symbol are GREY.

The Lane assistance cannot detect the lane
lines, the speed is too low or the road is too
narrow.

Indication of steering assistance/warning

Steering assistance/warning - the lane lines in the

symbol are COLOURED.

Lane assistance indicates that the system is
giving a warning and/or attempting to steer
the car back into the lane.

Related information

•

Lane assistance (p. 374)

•

Limitations of Lane assistance (p. 377)

111

Lane Keeping Aid

DRIVER SUPPORT

* Option/accessory.

381

Steering assistance at risk of

collision

The function

Collision avoidance assistance

can help the driver reduce the risk of the car
leaving its lane unintentionally and/or collid-
ing with another vehicle or obstacle by
actively steering the car back into its lane
and/or swerving.

The function consists of these subfunctions:

•

Steering assistance upon risk of run-off

•

Steering assistance upon risk of head-on
collision

•

Steering assistance upon risk of rear-end
collision

*

After automatic engagement, the driver dis-
play indicates that this has occurred via a text
message:

Collision avoidance assistance

Automatic

intervention

WARNING

•

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

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgement. The driver is always
responsible for ensuring the car is
driven in a safe manner, at the appro-
priate speed, with an appropriate dis-
tance to other vehicles, and in accord-
ance with current traffic rules and reg-
ulations.

NOTE

It is always the driver who decides how
much the car should steer – the car can
never take command.

Related information

•

Driving support systems (p. 280)

•

Activating or deactivating steering assis-
tance in the event of a collision risk
(p. 382)

•

Steering assistance upon risk of run-off
(p. 382)

•

Steering assistance upon risk of head-on
collision (p. 383)

•

Steering assistance upon risk of rear-end
collision

*

(p. 384)

•

Limitations for steering assistance at risk
of collision (p. 385)

•

Symbols and messages for steering assis-
tance upon risk of collision (p. 386)

DRIVER SUPPORT

* Option/accessory.

382

Activating or deactivating steering

assistance in the event of a

collision risk

The steering assistance function is optional –
the driver can choose to activate or deacti-
vate it.

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

•

GREEN button indication – the function is
activated.

•

GREY button indication – the function is
deactivated.

This function is activated automatically each
time the engine is started

112

.

NOTE

When the

Collision avoidance

assistance

function is deactivated, all sub-

functions are switched off:

•

Steering assistance at risk of road
departure

•

Steering assistance at risk of oncom-
ing collision

•

Steering assistance at risk of rear-end
collision

*

Even though it is possible to deactivate the
function, it is advisable for the driver to
always have it activated since it improves
driving safety in most cases.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

Limitations for steering assistance at risk
of collision (p. 385)

Steering assistance upon risk of

run-off

Steering assistance has a number of subfunc-
tions. Steering assistance in the event of run-
off risk can help the driver and reduce the risk
of the car accidentally leaving the road by
actively steering the car back onto the road.

The function has two activation levels on inter-
vention:

•

Steering assistance only

•

Steering assistance with brake interven-
tion

Steering assistance only

Intervention with steering assistance.

112

In certain markets, the setting used when the engine is switched off is reactivated.

DRIVER SUPPORT

}}

383

Steering assistance with brake intervention

Intervention with steering assistance and braking.

Brake intervention helps in situations where
steering assistance alone is not sufficient. The
brake force is adapted automatically depend-
ing on the situation at the time of road run-off.

The function is active within the speed range
65-140 km/h (40-87 mph) on roads with
clearly visible lane markings/lines.

A camera scans the edges of the road and the
painted side markings. If the car is about to
leave the side of the road, the car is steered
back onto the road and if the steering inter-
vention is not enough to avoid run-off, the
brakes are also activated.

However, the function does

not

intervene with

either steering assistance or brake interven-
tion if the direction indicators are used. And if
the function detects that the driver is actively

driving the car, activation of the function will
be delayed.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

Limitations for steering assistance at risk
of collision (p. 385)

Steering assistance upon risk of

head-on collision

Steering assistance has a number of subfunc-
tions. Steering assistance upon risk of head-
on collision can help a distracted driver who
does not notice that the car is heading into
the opposite lane.

The function can assist by guiding the car back to its

own lane.

Oncoming vehicles

Your car

At the same time as steering intervention is
activated, collision warning for driver support
is also activated. However, the brake pulse
included in the collision warning will not be
activated.

||

DRIVER SUPPORT

* Option/accessory.

384

The function is active within the speed range
60-140 km/h (37-87 mph) on roads with
clearly visible lane markings/lines.

If the car is about to leave its own lane while
an oncoming vehicle is approaching at the
same time, the function can help the driver to
steer the car back into its own lane.

However, the function does

not

intervene with

steering assistance if the direction indicator is
used. And if the function detects that the
driver is actively driving the car, activation of
the function will be delayed.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

Warning from driver support in the event
of a collision risk (p. 318)

•

Limitations for steering assistance at risk
of collision (p. 385)

Steering assistance upon risk of

rear-end collision

*

Steering assistance has a number of subfunc-
tions. Steering assistance if there is a risk of
rear-end collision can help a distracted driver
who does not notice that the car is about to
leave its own lane while an oncoming vehicle
is approaching at the same time, either from
behind or in the blind spot.

The function can assist by steering the car back to its

own lane.

Other vehicle in the blind spot

Your car

If the car is about to leave its own lane while
another vehicle is in the blind spot, or another
vehicle is approaching rapidly in an adjacent
lane at the same time, the function can help

the driver to steer the car back into its own
lane.

The function can even assist if the driver inten-
tionally changes lanes using direction indica-
tors without noticing that another vehicle is
approaching.

The function is active within the speed range
60-140 km/h (37-87 mph) on roads with
clearly visible lane markings/lines.

The lamps in the door mirrors flash during
steering intervention, regardless of whether
the BLIS

113

function is activated.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

BLIS

*

(p. 357)

•

Limitations for steering assistance at risk
of collision (p. 385)

113

Blind Spot Information

DRIVER SUPPORT

* Option/accessory.

385

Limitations for steering assistance

at risk of collision

In certain situations the function may have
limited functionality and fail to intervene in
the following cases, for example:

•

for small vehicles, such as motorcycles

•

if the majority of the car has steered into
the adjacent lane

•

on roads/in lanes with unclear or non-exis-
tent lane markings

•

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

•

as the steering servo for speed-dependent
steering wheel resistance is working at
reduced power – e.g. when cooling due to
overheating.

Other demanding situations can include:

•

road works

•

winter road conditions

•

narrow roads

•

poor road surface

•

a very “sporty” driving style

•

poor weather with reduced visibility.

In these demanding situations, the function
may have difficulty helping the driver correctly.
In such cases it is recommended to switch off
this function.

NOTE

This function uses the car's camera and
radar units, which have certain general lim-
itations.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

Steering assistance upon risk of run-off
(p. 382)

•

Steering assistance upon risk of head-on
collision (p. 383)

•

Steering assistance upon risk of rear-end
collision

*

(p. 384)

DRIVER SUPPORT

386

Symbols and messages for

steering assistance upon risk of

collision

A number of symbols and messages regar-
ding steering assistance may be shown in the
driver display. Here are some examples.

Symbol

Message

Specification

Collision avoidance assistance

Automatic intervention

When the function is activated, a message is shown to the driver indicating that the
system has been activated.

Windscreen sensor

Sensor blocked, see Owner's manual

The ability of the camera to scan the roadway in front of the car is reduced.

A text message can be cleared by briefly
pressing the

button, located in the centre

of the steering wheel's right-hand keypad.

If a message remains: Contact a workshop –
an authorised Volvo workshop is recom-
mended.

Related information

•

Steering assistance at risk of collision
(p. 381)

•

Limitations for steering assistance at risk
of collision (p. 385)

DRIVER SUPPORT

}}

* Option/accessory.

387

Park Assist

*

The Park Assist Pilot function can assist the
driver when manoeuvring in tight spaces by
indicating the distance to obstacles through
acoustic signals combined with a graphic in
the centre display.

Screen view showing obstacle zones and sensor sec-

tors.

The centre display shows an overview of the
relationship between the car and detected
obstacles.

The highlighted sector indicates the location
of the obstacle. The closer the car symbol is to
a highlighted sector box at the front/back, the
shorter the distance between the car and
detected obstacle.

The side sectors change colour as the distance
between the car and an object is reduced.

The shorter the distance to the obstacle, the
faster the signal sounds. Other sound from the
audio system is muted automatically.

The acoustic signal for obstacles ahead and to
the sides is active when the car is moving but
stops after the car has been stationary for
approx. 2 seconds. The acoustic signal for
obstacles behind is also active when the car is
stationary.

At a distance within approx. 30 cm (1 ft) from
an obstacle behind or in front of the car, the
tone is constant and the active sensor's field
closest to the car symbol is filled.

At a distance within approx. 25 cm (0.8 ft)
from an obstacle To the sides, the tone pulses
intensively and the active sector field changes
colour from ORANGE to RED.

The volume of the parking assistance signal
can be adjusted while the signal is sounding
by means of the [

>II

] knob on the centre con-

sole. Adjustment can also be performed in the
top view's

Settings

menu option.

NOTE

Except in the sector nearest to the car
symbol, audible warnings are only given for
objects directly in the path of the car.

WARNING

•

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

•

•

Driver support functions are not a sub-
stitute for the driver's attention and
judgement. The driver is always
responsible for ensuring the car is
driven in a safe manner, at the appro-
priate speed, with an appropriate dis-
tance to other vehicles, and in accord-
ance with current traffic rules and reg-
ulations.

Related information

•

Driving support systems (p. 280)

•

Park Assist Pilot front, rear and along the
sides

*

(p. 388)

•

Activating or deactivating the parking
assistance system

*

(p. 389)