The **emergency brake warning (EBD)** is an active safety system in vehicles. Its main function is to alert the driver behind that the vehicle in front is performing an emergency braking. This is achieved through the **rapid flashing of the brake lights** of the vehicle that is braking.

- When the driver of the vehicle in front presses the brake pedal firmly and quickly, the brake lights start to flash rapidly.
- This flashing serves as a signal for the driver coming from behind, giving them more time to react and brake, thus reducing the risk of collision.

This system is different from other safety systems, such as the **autonomous emergency braking (AEB)**, which uses radar to measure the distance between vehicles and can emit sound or voice signals. However, the EBD focuses exclusively on the flashing of the brake lights as a warning method.