Adaptive cruise control

Adaptive cruise control*

Updated 5/28/2021

Adaptive cruise control*

The adaptive cruise controlThis function can be either standard or optional, depending on market. (ACCAdaptive Cruise Control) can help the driver to maintain a constant speed, combined with a preselected time interval to the vehicle ahead.

P5-1507-CitySafety Princip

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

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

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 ahead. When the road is clear again the car returns to the selected speed.

The adaptive cruise control aims to:

  • regulate the speed smoothly. In situations that demand sudden braking the driver must brake himself/herself. This applies in cases 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.
  • 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 stored by the driver. This also takes place if the speed of the vehicle ahead increases and exceeds the stored speed.

Steep roads and/or heavy load

Bear in mind that the adaptive cruise control is primarily intended for use when driving on level road surfaces. The function may have difficulty in keeping the correct distance from the vehicle ahead when driving on steep downhill slopes – in which case, be extra attentive and ready to brake.

Do not use adaptive cruise control if the car has a heavy load or a trailer is connected to the car.

Warning

  • This is not a collision avoidance system. The driver is always responsible and must intervene if the system does not detect a vehicle ahead.
  • The function 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 function in demanding situations, such as 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.

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.
  • The driver is advised to read all sections 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.
  • Driver support functions are not a substitute for the driver's attention and judgement. The driver is always responsible for ensuring the car 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

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

Important

Maintenance of driver support components must only be performed at a workshop – an authorised Volvo workshop is recommended.


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