Lane keeping aid

Updated 2024-04-25

Lane keeping aid helps prevent accidental high-speed lane departures by providing warnings and steering interventions.

When lane keeping aid is enabled, the car can alert you if you are about to drift out of your lane. It can also perform steering interventions. Lane keeping aid depends on the car's forward-facing camera to identify road markings and your position in the lane.

Warning

Lane keeping aid warnings and interventions are supplements to safe driving practices. They do not reduce or replace the need for the driver to stay attentive and focused on driving safely. Drive the car with the same attention to safety as required by a car without the ability to intervene.

Main conditions for lane keeping aid

For lane keeping aid to work, several conditions need to be met. The following are the most essential:

Your speed must be in the range 60-180 km/h (40-110 mph).
The lane markings must be clearly visible for the car's camera to see.
The lane must be wide enough. A very narrow lane does not provide enough margin between the car and the road markings.
You must keep your hands on the steering wheel and actively steer the car.

Important

Steering actively

Never let go of the steering wheel when driving. Do not dismiss the car's requests for you to steer actively and keep your attention on the road.

Lane keeping aid intervention types

If you are about to cross your lane's road markings, your car can warn or intervene in either or both of the following ways:

Steering intervention	The car tries to steer back into the lane.
Lane departure warning	The car alerts you using sound and steering wheel vibrations.

Note

Indicating a turn or lane change

As long as you use the turn indicators when changing lanes, the car assumes it's an intentional manoeuvre.

Cutting a corner

Lane keeping aid may allow you to briefly cut across the line at sharp corners.

Safety interventions are always enabled

Some situations can cause a steering intervention to prevent a dangerous lane departure even if lane keeping aid is turned off in settings.

Display symbols and communication

Lane keeping aid warnings and interventions are communicated in the driver display.

	This symbol appears if you are coming too close to the lane markings. The symbol is mirrored during left-hand side warnings.
	This symbol indicates that lane keeping aid is disabled in settings or temporarily unavailable.
	This symbol appears when there is a lane keeping aid malfunction. This means that lane keeping aid and safety interventions to prevent lane departures are disabled.

Conditions and limitations

For lane keeping aid to work, road markings must be present and visible. The car identifies them using a forward-facing camera. This form of detection requires that the camera view is unobstructed and that the conditions for visual detection are present. Read the separate section about the conditions and limitations of your car's cameras to understand how features relying on camera detection are affected.

The appearance, condition and layout of road markings can affect their detection in the following ways:

Lane divisions and mergers can cause temporary misidentification of the lane.
Non-standard or unusual road marking layouts might not be identified correctly by the car. For example, road work or traffic diversions can result in conflicting or multiple sets of road markings.
The car may be unable to detect deteriorated road markings, for example if they are worn, misshapen or discoloured.
Other edges or lines can be misidentified as road markings, such as kerbs, road surface repair edges, barriers or well-defined shadows.
Road markings must be sufficiently illuminated to be detected. In low-light conditions, they need to be illuminated by the car or street lights.