Driver Monitoring System (DMS)
A driver monitoring system (DMS) observes whether the driver appears attentive and able to supervise the vehicle. Modern systems commonly use an inward-facing camera, sometimes combined with steering input and other vehicle signals.
What it does
The system can estimate gaze direction, eyelid state, head pose, and whether the driver is present. If attention moves away from the road for too long, or if the driver does not respond to a takeover request, it can issue escalating visual, audible, or haptic warnings. Some implementations may restrict assistance or initiate a minimum-risk response.
DMS performance can be affected by sunglasses, low light, camera obstruction, seating position, facial coverings, and individual behavior. It estimates observable cues; it does not read thoughts or guarantee that the driver is fit to drive. The driver remains responsible for staying alert and following system requests.
For sensing methods, attention logic, and responses, see Driver Monitoring System.