What is a driver monitoring system?

Driver monitoring systems use in-cabin sensors and software to estimate attention or drowsiness. Their capabilities vary by vehicle, hardware, market, and manufacturer.

Vehicle-integrated systems

Built-in systems may use infrared cameras, steering behaviour, lane position, or multiple signals. They can integrate with vehicle warnings but remain driver-assistance features, not autonomous safety guarantees.

Phone-based systems

A phone uses its own camera, processor, speaker, and mount. It generally has less stable positioning and no direct access to the vehicle safety architecture.

Signals and blind spots

Eye closure, gaze, head pose, steering patterns, and lane behaviour each cover only part of fatigue and distraction. Sunglasses, lighting, posture, and individual behaviour can affect performance.

Use the manual

Follow the vehicle manufacturer’s instructions, keep sensors clear, and understand whether the system is active. Do not assume every warning icon represents the same capability.

Where EyeJolt sits

EyeJolt is a consumer alertness aid. It does not replace a factory driver-monitoring system, legal compliance, sleep, or a decision to stop.

Privacy questions

Ask whether video is processed locally, retained, shared, or associated with an account. EyeJolt processes camera signals locally and does not record camera frames.

Sources

Written by the EyeJolt Editorial Team. Published and last reviewed 2026-07-14. Editorial policy.