Querverkehrswarner

Querverkehrswarner is a driver assistance feature designed to detect vehicles approaching from the side when the occupant's vehicle is moving in reverse, such as when backing out of a parking space or driveway. It is commonly marketed in German-speaking markets under this term and is known in English as rear cross-traffic alert (RCTA). The system helps reduce the risk of collisions with cross-traffic.

The technology uses rear-mounted sensors, typically radar or cameras, to monitor areas to the left and right of the vehicle’s rear. When cross-traffic is detected within a defined warning zone, the system issues visual and audible alerts, and in some configurations may provide haptic feedback via the brake pedal. In certain setups, the Querverkehrswarner can automatically apply braking or assist with braking to mitigate or prevent a collision.

It is commonly offered as part of advanced driver-assistance systems and may be included as standard equipment or as an option in many modern cars. The effectiveness depends on sensor placement, weather conditions, object type, and other factors; it may not detect pedestrians or smaller objects in all situations.

Regulatory and market context: While widely available and recommended for safety, Querverkehrswarner is not universally mandated in vehicle safety regulations, though it is increasingly included in ADAS packages and can be bundled with other features such as blind-spot monitoring or cross-traffic warning.