Lane assistance

The function of the Lane Keeping Aid (LKA1) 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 unavailable, in which case it goes into standby mode. The function becomes available again when the road is wide enough.

P5-1507-DAS Princip för DAC
A camera reads the side lines of the road/lane.
P5-1507-LKA Princip Styrhjälp
Lane assistance steers the car back into its lane.
P5-1507-LKA Princip Varning+Styrhjälp
Lane assistance warns with steering wheel vibrations2.
Depending on settings, lane assistance acts in accordance with the following:
  • Assist3 activated: When the car is approaching a lane line, LKA will actively steer the car back into its lane by applying a slight torque to the steering wheel.
  • Warning3 activated: If the car is about to cross a lane line, the driver is warned by means of vibrations in the steering wheel.


When a direction indicator is switched on, there are no steering corrections or alerts from Lane assistance.


  • The Lane Keeping Aid function is supplementary driver support intended to improve driving safety – it cannot handle all situations in all traffic, weather and road conditions.
  • The function is 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.

Lane assistance does not intervene

P5-1507-LKA Princip Gena i kurva
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.

  1. 1 Lane Keeping Aid
  2. 2 The steering wheel vibration varies - the longer the car remains outside the lane lines, the longer the vibration.
  3. 3 See the heading "Assistance alternatives for LKA" in the section "Activating/Deactivating Lane Keeping Aid".