An emergency brake, also known as a handbrake or parking brake, is a safety feature in vehicles designed to stop the car in case of a failure in the main braking system. It is typically operated by a lever or a pedal and can be engaged manually. This brake is crucial for preventing the vehicle from rolling when parked, especially on inclines. In most vehicles, the emergency brake works on the rear wheels and is independent of the regular braking system. It is important for drivers to know how to use the emergency brake effectively, as it can provide an additional layer of safety in unexpected situations, such as a brake failure while driving.