Driver support -> City Safety for Your Volvo XC40 SUV 2020

Messages for City Safety (p. 286)

•

If the speed difference between the driver's

car and the obstacle is greater than the follow-

ing specified speeds, the City Safety auto-

brake function cannot prevent a collision but it

can mitigate the consequences of a collision.

The driver is advised to read all sec-

tions in the Owner's Manual that relate

to this function to learn about factors

such as its limitations and what the

driver should be aware of before using

the system.

Vehicles

For a vehicle in front, City Safety can reduce

the speed by up to 60 km/h (37 mph).

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.

•

Cyclists

For a cyclist, City Safety can reduce the speed

by up to 50 km/h (30 mph).

Pedestrians

For a pedestrian, City Safety can reduce speed

by up to 45 km/h (28 mph).

Large animals

In the event of a risk of a collision with a large

animal, City Safety can reduce the car's speed

by up to 15 km/h (9 mph).

Related information

Driving support systems (p. 266)

•

Subfunctions for City Safety (p. 274)

The brake function for large animals is primar-

ily intended to reduce the force of the impact

at higher speeds and is most effective at

speeds above 70 km/h (43 mph) but less

effective at lower speed.

Setting the warning distance for City

Safety (p. 276)

Detection of obstacles with City Safety

(p. 277)

•

274

DRIVER SUPPORT

Brake support reinforces the driver’s braking

action if the system considers that the braking

is not sufficient to avoid a collision.

The steps of City Safety

City Safety carries out three steps in the fol-

lowing order:

On cars with manual gearbox, the engine

stops when the Auto-brake function has

stopped the car, unless the driver has man-

aged to depress the clutch pedal before-

hand.

3 - Auto Brake

The automatic brake function is activated last.

1. Collision warning

2. Brake support

3. Auto Brake

If in this situation the driver has not yet started

to take evasive action and the risk of collision

is imminent then the automatic braking func-

tion is deployed - this takes place irrespective

of whether or not the driver brakes. Braking

then takes place with full brake force in order

to reduce collision speed, or with limited brake

force if it is sufficient to avoid a collision.

1 - Collision warning

The driver is first warned of a potentially immi-

nent collision.

The driver can always interrupt a braking inter-

vention by firmly depressing the accelerator

pedal.

City Safety can detect pedestrians, cyclists or

vehicles that are stationary or moving in the

same direction as the car and are ahead. City

Safety can also detect pedestrians, cyclists or

large animals that are crossing the road in

front of the car.

When City Safety brakes, the brake lights

come on.

The seatbelt tensioner can be activated in con-

nection with the engagement of the automatic

brake function.

When City Safety is activated and brakes the

vehicle, the driver display shows a text mes-

sage to the effect that the function is/has

been active.

In the event of a risk of collision with a pedes-

trian, larger animal, cyclist or vehicle, the

driver is alerted by means of a visual, acoustic

and brake pulse warning. There is no brake

pulse warning at lower speeds, sudden driver

braking or acceleration. The brake pulse fre-

quency varies according to the car's speed.

In some situations, the action of Auto-brake

may begin with light braking and then pro-

gress to full brake action.

When City Safety has prevented a collision

with a stationary object, the car remains sta-

tionary in anticipation of positive action by the

driver. If the car has been braked to avoid colli-

sion with a slower vehicle in front, its speed is

reduced to match that of the vehicle in front.

WARNING

City Safety must not be used by the driver

to change his/her driving style - the driver

must not rely on City Safety alone and

allow it to do the braking.

2 - Brake support

If the risk of collision has increased further

after the collision warning then the brake sup-

port is activated.

14

The function is not available in all markets.

}}

275

DRIVER SUPPORT

||

When warnings are perceived as being too

frequent or disturbing, the warning distance

can be reduced, which reduces the total num-

ber of warnings and instead leads to City

Safety giving a warning at a later stage.

Related information

Setting the warning distance for

City Safety

City Safety in cross traffic (p. 280)

•

City Safety¹⁵is always activated but the

driver can select the warning distance for the

function.

•

City Safety brakes for oncoming vehicles

(p. 282)

The Late warning distance should therefore

only be used in exceptional cases, as in

dynamic driving.

Seatbelt tensioner (p. 47)

•

The City Safety function cannot be deacti-

vated. It is activated automatically when

the engine/electric operation is started and

remains switched on until the engine/elec-

tric operation is switched off.

The warning distance determines the sensitiv-

ity of the system and regulates the distance at

which a visual, acoustic and brake pulse warn-

ing should be deployed.

To select warning distance:

1. Select Settings My Car IntelliSafe

in the centre display's top view.

2.

Under City Safety Warning, select either

Late, Normal or Early to set the desired

warning distance.

If the Early setting produces too many warn-

ings, which could be perceived as irritating in

certain situations, the Normal or Late warn-

ing distance can be selected.

15

The function is not available in all markets.

276

DRIVER SUPPORT

Detection of obstacles with City

Safety

WARNING

No automatic system can guarantee

100% correct function in all situations.

Therefore, never test City Safety by

driving at people, animals or vehicles -

this may cause severe damage and

injury and risk lives.

The warning with direction indicators for

Rear Collision Warning* is deactivated if

the warning distance for collision warning

in the City Safety function is set at the low-

est level "Late".

•

City Safety¹⁶can help the driver to detect

vehicles, cyclists, large animals and pedes-

trians.

Vehicles

City Safety detect most vehicles that are sta-

tionary or moving in the same direction as the

driver's own car. This function can also detect

oncoming vehicles and cross traffic in certain

cases.

The seat belt pre-tensioning and braking

functions are, however, still active.

City Safety warns the driver when

there is a risk of a collision, but it can-

not shorten the driver’s reaction time.

•

Related information

Even if the warning distance has been

set to Early warnings could be per-

ceived as being late in certain situa-

tions, e.g. when there are large differ-

ences in speed or if vehicles ahead

suddenly brake heavily.

•

In order that City Safety shall be able to detect

a vehicle in the dark, the vehicle's front and

rear lights must be working and clearly illumi-

nated.

Rear Collision Warning* (p. 342)

With the warning distance set at Early,

the warnings will come more in

•

advance. This may mean that the warn-

ings come more frequently than at the

warning distance Normal, but it is rec-

ommended since it can make City

Safety more effective.

16

The function is not available in all markets.

}}

* Option/accessory. 277

DRIVER SUPPORT

||

Good performance requires that the system

function that detects a pedestrian must

receive the clearest possible information about

the body outline, requiring the ability to iden-

tify the head, arms, shoulders, legs, upper and

lower body plus a normal human pattern of

movement.

Cyclists

WARNING

City Safety is supplementary driver sup-

port, but it cannot detect all cyclists in all

situations and, for example, cannot see:

partially obscured cyclists.

•

cyclists if the background contrast for

the cyclists is poor.

In order that it shall be possible to detect a

pedestrian there must be a contrast with the

background and this will be affected by such

things as clothes, the background and the

weather. With poor contrast the pedestrian

may either be detected late or not at all, which

may mean that warnings and braking are late

or omitted.

cyclists wearing clothing that obscures

the body outline.

•

bicycles loaded with large objects.

Warnings and brake interventions could be

late or not occur at all. The driver is always

responsible that the vehicle is driven cor-

rectly and with a safety distance adapted

to the speed.

Examples of what City Safety interprets as a cyclist

— with clear body outline and bicycle outline.

Good performance requires that the system

function that detects a cyclist must receive the

clearest possible information about the body

and bicycle outline, requiring the ability to

identify the bicycle, head, arms, shoulders,

legs, upper and lower body plus a normal

human pattern of movement.

City Safety can also detect pedestrians in the

dark if they are illuminated by the car's head-

lamps.

Pedestrians

If large parts of the cyclist's body or bicycle

are not visible to the function's camera then

the system cannot detect a cyclist.

For the function to be able to detect a cyclist,

he/she must be an adult and riding a bicycle

designed for adults.

Examples of what the system regards as pedestrians

with clear body outlines.

278

DRIVER SUPPORT

Large animals

WARNING

City Safety is supplementary driver sup-

port, but it cannot detect all pedestrians in

all situations and, for example, cannot see:

City Safety is supplementary driver sup-

port, but it cannot detect all large animals

in all situations and, for example, cannot

see:

partially obscured pedestrians, people

in clothing that hides their body con-

tour or pedestrians shorter than 80 cm

(32 in.).

•

partially obscured large animals.

•

larger animals seen from the front or

from behind.

pedestrians if the background contrast

for the pedestrians is poor.

•

large animals that run or move quickly.

•

large animals if the background con-

trast for the animals is poor.

pedestrians who are carrying larger

objects.

small animals such as dogs and cats,

for example.

•

Examples of what City Safety interprets as large ani-

mals - standing still or walking slowly and with clear

body outline.

Warnings and brake interventions could be

late or not occur at all. The driver is always

responsible that the vehicle is driven cor-

rectly and with a safety distance adapted

to the speed.

Warnings and brake interventions could be

late or not occur at all. The driver is always

responsible that the vehicle is driven cor-

rectly and with a safety distance adapted

to the speed.

Good performance requires that the system

function that detects a large animal (e.g. elk

and horse) must receive the clearest possible

information about the body outline, requiring

the ability to identify the animal directly from

the side in combination with what is a normal

pattern of movement for the animal.

Related information

•

•

If parts of the animal's body are not visible to

the function's camera then the system cannot

detect the animal.

City Safety can also detect large animals in the

dark if they are illuminated by the car's head-

lamps.

279

DRIVER SUPPORT

the oncoming vehicle must have its head-

lamps switched on.

City Safety in cross traffic

•

Limitations for City Safety in cross

traffic

In some cases City Safety may have difficulty

helping the driver deal with collision risks due

to oncoming cross traffic.

City Safety¹⁷can help the driver when turning

and crossing the path of another oncoming

vehicle at an intersection.

Related information

•

•

Sector in which City Safety can detect

oncoming crossing vehicles.

Examples are:

For City Safety to detect an oncoming vehicle

on a collision course, the oncoming vehicle

must first enter the sector in which City Safety

can analyse the situation.

Stability control ESC intervenes in the

event of slippery driving conditions.

•

If the oncoming vehicle is detected too

late.

The following further criteria must also be ful-

filled:

If the oncoming vehicle is obscured by

something.

your car must be travelling at no less than

4 km/h (3 mph)

•

If the oncoming vehicle has headlamps

switched off.

your car must turn to the left in markets

with right-hand traffic (or to the right in

left-hand traffic)

•

If the oncoming vehicle drives in an unpre-

dictable manner, for example, abruptly

changes lanes at a late stage.

17

The function is not available in all markets.

280

DRIVER SUPPORT

City Safety does not intervene with the auto-

brake function as long as the driver him/

herself has the opportunity to avoid a collision

via a steering manoeuvre.

Automatic braking in the event of

an impeded evasive manoeuvre

with City Safety

City Safety¹⁸has the facility to assist the

driver by automatically braking the car earlier

when it is not possible to avoid a collision by

only steering away.

City Safety assists the driver by continuously

attempting to anticipate whether there are

"escape routes" to the side in case a slow or

stationary vehicle ahead is discovered at a late

stage.

City Safety in cross traffic (p. 280)

This function uses the car's camera and

radar units, which have certain general lim-

itations.

However, if City Safety anticipates that an

evasive manoeuvre is not possible due to traf-

fic in an adjacent lane, the function can assist

the driver by automatically starting to brake at

an earlier stage.

Related information

•

Limitations for camera and radar unit

(p. 387)

Related information

•

•

Your car (1) "sees" no options for evading the vehicle

ahead (2) and can therefore auto-brake earlier.

Your car

Slow/stationary vehicle

18

The function is not available in all markets.

281

DRIVER SUPPORT

your car's lane must have clear lane mark-

ings

City Safety brakes for oncoming

vehicles

City Safety can assist the driver to use emer-

gency braking for an oncoming vehicle in

your car's lane.

If an oncoming vehicle enters your car's lane

and a collision is unavoidable, City Safety can

reduce the car's speed with a view to reducing

the violence of the impact.

•

Limitations of City Safety

The City Safety¹⁹function may have limita-

tions in certain situations.

your car must be positioned straight in its

own lane

Surroundings

the oncoming vehicle must be within your

car's lane markings

Low objects

Low-hanging objects, e.g. a flag/pennant for

projecting load, or accessories such as auxili-

ary lamps and bull bars that are higher than

the bonnet limit the function.

the oncoming vehicle must have its head-

lamps switched on

this function can only handle "front to

front" collisions

Skidding

this function can only detect vehicles with

four wheels.

On slippery road surfaces the braking distance

is extended, which may reduce the capacity of

City Safety to avoid a collision. In such situa-

tions, the anti-lock brakes and the stability

control ESC²⁰are designed to give the best

possible braking force with maintained stabil-

ity.

WARNING

Warnings and brake interventions due to

an impending collision with an oncoming

vehicle always come very late.

Oncoming light

Related information

The visual warning signal in the windscreen

may be difficult to notice in the event of strong

sunlight, reflections, when sunglasses are

being worn or if the driver is not looking

straight ahead.

•

Your car

•

Oncoming vehicles

Heat

For this function to work, the following criteria

must be met:

In the event of high passenger compartment

temperature caused by e.g. strong sunlight,

the visual warning signal in the windscreen

may be temporarily disengaged.

your car must be travelling at more than

4 km/h (3 mph)

•

the road section must be straight

•

282

DRIVER SUPPORT

The camera and radar unit's field of view

The camera's field of vision is limited, which is

why pedestrians, large animals, cyclists and

vehicles in some situations cannot be

detected, or they are detected later than

anticipated.

Driver intervention

Important warnings

WARNING

Reversing

When your own car is reversing, City Safety is

temporarily deactivated.

Driver supports only warn of obstacles

which their radar unit has detected –

hence a warning may not be given, or it

may be given with a certain delay.

Low speed

City Safety is not activated at very low speeds

- below 4 km/h (3 mph) - and the system

therefore does not intervene in situations

where your car is approaching a vehicle ahead

very slowly, e.g. when parking.

Dirty vehicles may be detected later than oth-

ers and if it is dark, motorcycles may be

detected late or not at all.

Never wait for a warning or interven-

tion. Apply the brakes when the situa-

tion requires.

•

If a text message in the driver display indicates

that the camera or radar unit is obstructed,

City Safety may be unable to detect pedes-

trians, large animals, cyclists, vehicles or road

lines ahead of the car. This means that the

functionality of City Safety may be reduced.

Active driver

Driver commands are always prioritised,

which is why City Safety does not intervene or

postpone warning/intervention in situations

where the driver is steering and accelerating in

a decisive manner, even if a collision is

unavoidable.

However, an error message is not shown in all

situations where the windscreen sensors are

obstructed. The driver must therefore take

care to keep the area of windscreen in front of

the camera and radar unit clear.

Active and aware driving behaviour can there-

fore delay a collision warning and intervention

in order to minimise unnecessary warnings.

IMPORTANT

Maintenance of driver support components

must only be performed at a workshop –

an authorised Volvo workshop is recom-

mended.

19

The function is not available in all markets.

Electronic Stability Control

20

}}

283

DRIVER SUPPORT

||

may be disengaged due to darkness or

poor visibility.

WARNING

Warnings and brake interventions

The City Safety auto-brake function

can prevent a collision or reduce colli-

sion speed, but to ensure full brake

performance the driver should always

depress the brake pedal – even when

the car auto-brakes.

•

Warnings and brake interventions for

pedestrians and cyclists are deacti-

vated at vehicle speeds exceeding

80 km/h (50 mph).

•

could be implemented late or not at all

if a traffic situation or external influ-

ences mean that the camera and radar

unit cannot detect pedestrians,

cyclists, large animals or vehicles cor-

rectly.

Do not place, stick or mount anything

on the outside or inside of the wind-

screen in front of or around the camera

and radar unit — this can interfere with

camera-dependent functions.

The warning is only activated if there is

a high risk of collision – you must

therefore never wait for a collision

warning.

•

For vehicles to be detected at night,

their headlamps and rear lamp cluster

must be switched on and shining

clearly.

•

Objects, snow, ice or dirt in the area of

the camera sensor may reduce its func-

tionality, fully deactivate it or give

incorrect function response.

•

The warning and brake intervention for

pedestrians and cyclists are deacti-

vated at vehicle speeds exceeding

80 km/h (50 mph).

The camera and radar unit has a limited

range for pedestrians and cyclists. The

system can provide effective warnings

and brake interventions as long as the

relative speed is below 50 km/h

(30 mph). For stationary or slow-mov-

ing vehicles, warnings and brake inter-

ventions are effective at vehicle speeds

up to 70 km/h (43 mph). Speed reduc-

tion for large animals is less than 15

km/h (9 mph) and can be achieved at

vehicle speeds above 70 km/h

City Safety does not activates any

auto-brake functions in the event of

heavy acceleration.

This function uses the car's camera and

radar units, which have certain general lim-

itations.

(43 mph). The warning and brake inter-

vention for large animals is less effec-

tive at lower speeds.

Market limitation

City Safety is not available in all countries. If

City Safety does not appear in the centre dis-

play's Settings menu, the car is not equipped

with this function.

Warnings for stationary or slow-mov-

ing vehicles as well as large animals

•

284

DRIVER SUPPORT

Search path in the top view of the centre dis-

play:

•

Settings My Car IntelliSafe

Related information

•

Limitations for camera and radar unit

(p. 387)

•

285

DRIVER SUPPORT

Messages for City Safety

A number of messages regarding City Safety

can be shown in the driver display. Here are

some examples.

Message

Specification

When City Safety brakes or has done an automatic braking, several of the driver display symbols may be

illuminated in connection with a text message being shown.

City Safety

Automatic intervention

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

City Safety

Reduced functionality Service

required

A

An authorised Volvo workshop is recommended.

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