What is the primary function of the parking brake?

The primary function of the parking brake, also known as the emergency brake or handbrake, is to secure the vehicle when it is parked, preventing it from rolling away unintentionally. In situations where the primary hydraulic brakes fail, the parking brake provides an alternative method to activate the rear brakes. This is crucial for safety, as it can help bring the vehicle to a stop in an emergency situation where traditional brakes may not be functioning properly.

While the parking brake can assist in various driving scenarios, such as parallel parking or enhancing stability on inclines, its core purpose remains focused on securing the vehicle in a stationary position and serving as a backup braking system when needed.