The emergency brake, also known as the parking brake, is not typically a hydraulic system that is automatically actuated when the driver depresses the pedal. Instead, it is usually a mechanical system that is engaged by pulling a lever or pressing a button. When engaged, the parking brake locks the rear wheels of the vehicle in place, preventing it from rolling.
Some vehicles do have an automatic parking brake feature that can be engaged by pressing a button on the dashboard. This feature uses the vehicle's electronic stability control system to apply the brakes automatically when the vehicle is parked. However, this feature is not standard on all vehicles, and it is not a substitute for the manual parking brake.
