The **ADAS systems** (Advanced Driver Assistance Systems) are technologies that help improve safety and driving. In the context of tests to obtain a driving license, only some of these systems are allowed.

- **AEBS (Automatic Emergency Braking System):** This system uses a radar to calculate the distance between your vehicle and the one in front. If the distance is too short and there is a risk of collision, the system emits an audible alert and, if you do not react, performs an emergency braking automatically. This helps prevent accidents by stopping the vehicle without driver intervention.

- **Hill Holder (Hill Start Assist System):** Although not specifically mentioned in the provided excerpts, this system is known for preventing the vehicle from rolling backward when starting on a slope. This is achieved by keeping the brakes applied for a brief moment after releasing the brake pedal, facilitating hill starts.

These two systems, the **AEBS** and the **Hill Holder**, are the only ones allowed during driving tests, as they are designed to enhance safety without interfering with the driver's ability to control the vehicle.