Adaptive cruise control

Adaptive cruise control*

Updated 7/23/2018

The adaptive cruise control (Adaptive Cruise Control - ACC) helps the driver to maintain an even speed combined with a pre-selected time interval to the vehicle ahead.

An adaptive cruise control provides a more relaxing driving experience on long journeys on motorways and long straight main roads in smooth traffic flows.

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The camera and radar unit measures the distance to the vehicle ahead

NOTE: The illustration is schematic - details may vary depending on car model.

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The driver selects the desired speed and a time interval to the vehicle ahead. If the camera and radar unit detects a slower vehicle in front of the car, the speed is adapted automatically via the preset time interval to the vehicle. When the road is clear again the car returns to the selected speed.

Warning

The Adaptive cruise control is an aid, which cannot handle all traffic, weather and road conditions.

The driver must always be observant with regard to the prevailing traffic conditions and intervene if the Adaptive cruise control does not maintain a suitable speed or suitable time interval.

Read all the sections about the adaptive cruise control in the owner's manual in order to learn about its limitations, of which the driver should be aware before the function is used.

The driver always bears responsibility for maintaining the correct time interval and speed - even when the Adaptive cruise control is being used.

Adaptive cruise control regulates the speed with acceleration and braking. It is normal for the brakes to emit a low sound when they are being used to adjust the speed.

The adaptive cruise control aims to control the speed in a smooth way. In situations that demand sudden braking the driver must brake himself/herself. This applies in case of large speed differences or if the vehicle in front brakes suddenly. Due to the limitations of the radar unit, braking may come unexpectedly or not at all.

The adaptive cruise control aims to follow the vehicle ahead in the same lane at a time interval set by the driver. If the radar unit cannot see any vehicle in front then the car will instead maintain the speed set and stored by the driver. This also takes place if the speed of the vehicle ahead increases and exceeds the stored speed.

The following applies for cars with automatic gearbox:

  • Adaptive cruise control can follow another vehicle at speed from 0 km/h up to 200 km/h (125 mph).

The following applies for cars with manual gearbox:

  • The Adaptive cruise control can follow another vehicle at speeds from 30 km/h(20 mph) up to 200 km/h(125 mph).

Warning

Adaptive cruise control is not a collision avoidance system. The driver must intervene if the system does not detect a vehicle in front.

The adaptive cruise control does not brake for humans or animals, and not for small vehicles such as bicycles and motorcycles. Nor for low trailers, oncoming, slow or stationary vehicles and objects.

Do not use the Adaptive cruise control, for example, in city traffic, at junctions, on slippery surfaces, with a lot of water or slush on the road, in heavy rain/snow, in poor visibility, on winding roads or on slip roads.

Important

Maintenance of adaptive cruise control components must only be performed at a workshop - an authorised Volvo workshop is recommended.

Overview

Controls

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Buttons and symbols for functions

NOTE: The illustration is schematic - details may vary depending on car model.

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Increases stored speed or reactivates the adaptive cruise control and resumes stored speed and time interval
Activate the adaptive cruise control and store the current speed or deactivate the adaptive cruise control
Reduces stored speed
Increases the time interval to vehicles ahead
Reduces the time interval to vehicles ahead
Target vehicle indicator: ACC has detected and is following a target vehicle at the preset time interval
Symbol for time interval to vehicles ahead

In cars equipped with the adaptive cruise control option, the driver can change between CC and ACC - see "Change between Cruise control and adaptive cruise control".

Driver display

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Indication of speeds

NOTE: The illustration is schematic - details may vary depending on car model.

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Stored speed
Speed of vehicle ahead.
Current speed of your car.

To see different combinations of symbols depending on traffic situation - see the heading "Symbols and messages for the adaptive cruise control".

Collision risk warning

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Audio and symbol for collision warning

NOTE: The illustration is schematic - details may vary depending on car model.

Acoustic warning signal in the event of a risk of collision
Warning signal in the event of a risk of collision
Distance measurement with the camera and radar unit

Adaptive Cruise Control uses approx. 40% of the capacity of the foot brake. If the car needs to be braked more heavily than the adaptive cruise control is capable of and the driver does not brake, the warning lamp and acoustic warning are activated to alert the driver that immediate intervention is required.

Warning

The adaptive cruise control only warns of vehicles which its radar unit has detected - hence a warning may not be given, or it may be given with a certain delay. Do not wait for a warning without braking when so required.

Head-up display*

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Symbol for collision warning on the windscreen

NOTE: The illustration is schematic - details may vary depending on car model.

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In cars equipped with a head-up display, the warning is shown on the windscreen by a flashing symbol.

Note

Information on the windscreen may be difficult to see in strong sunlight and when wearing sunglasses.


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