DS 3: Active Lane Departure Warning System / Driving situations and related alerts

Operation

As soon as the system identifies a risk of involuntarily crossing one of the lane markings detected on the ground or a lane boundary (e.g. grass verge), it performs the trajectory correction necessary to restore the vehicle to its original lane...

Operating limits

The system goes into standby automatically in the following cases: ESC deactivated or operation triggered. Speed below 43 mph (70 km/h) or greater than 112 mph (180 km/h), Electrical connection of a trailer...

Other information:

DS 3 2016-2023 Owners Manual: Cruise control - particular recommendations

For the safety of everyone, only use the cruise control where the driving conditions allow running at a constant speed and keeping an adequate safety distance. Remain vigilant when the cruise control is activated. If you hold one of the speed setting modification buttons down, a very rapid change in the speed of your vehicle may occur...

DS 3 2016-2023 Owners Manual: Advice

The driver must ensure that passengers use the seat belts correctly and that they are all fastened before setting off. Wherever seated in the vehicle, you must always fasten the seat belt, even for short journeys. Do not invert the seat belt buckles, as they will not fulfil their role properly...