What is the effective working speed range for LKA Lane Keeping Assist?
2 Answers
Lane keeping systems are designed for highways and well-maintained ordinary roads, therefore this system only activates when the vehicle speed exceeds approximately 65km/h. When environmental conditions are poor, such as dirty road surfaces, snow-covered roads, excessively narrow lanes, or unclear road markings (e.g., during highway construction), the lane keeping system will be temporarily deactivated. The instrument cluster will display the current status of the system to the user. Below are detailed specifications: 1. Function: Lane Keeping Assist is a feature within the Driver Alert System - sometimes referred to as "LKA" (Lane-Keeping-Aid). This function helps reduce the risk of unintentional lane departure on highways or similar arterial roads under certain conditions. The camera sensors used in Lane Keeping Assist have limitations similar to human vision. 2. Operation: When the vehicle approaches an identified lane boundary with risk of departure, the steering wheel vibrates to alert the driver. This steering wheel vibration warning occurs only once when the vehicle nears and crosses the lane boundary. A second warning will only be triggered if the vehicle moves sufficiently away from the boundary after the first warning and then approaches it again. This prevents continuous warnings when driving parallel to lane markings.
I've just driven several cars equipped with LKA (Lane Keeping Assist). Most systems activate only when the speed reaches above 30 km/h. For example, on urban ring roads maintaining around 55 km/h, you can feel slight steering corrections. However, the specific range depends on the car model. Japanese cars typically operate between 40-180 km/h, while German cars might range from 50-200 km/h. Why is there a lower speed limit? At low speeds, such as below 30 km/h, lane markings may be unclear or assistance might not be necessary, so the system automatically disables to avoid misjudgment. The higher upper limit ensures safety during high-speed driving, but don't rely on it completely—always keep your hands on the wheel. It's recommended to regularly clean the windshield camera and test the system's response before long-distance drives, as different road conditions can affect its accuracy.
