The primary braking system is the hydraulic brake system, which uses brake fluid to transfer force from the brake pedal to the brake pads or shoes. The secondary braking system is the parking brake, which is a mechanical system that uses a cable to hold the brake pads or shoes in place.
Some vehicles also have a third braking system, which is called the anti-lock braking system (ABS). The ABS system uses sensors to detect when the wheels are about to lock up, and then it modulates the brake pressure to prevent the wheels from locking up.
Finally, some vehicles also have a fourth braking system, which is called the electronic stability control (ESC) system. The ESC system uses sensors to detect when the vehicle is about to lose control, and then it applies the brakes to individual wheels to help the driver maintain control of the vehicle.
