What systems do all vehicles with air brakes have?

All vehicles equipped with air brakes are required to have a comprehensive braking system that includes emergency brakes, parking brakes, and service brakes. Emergency brakes are crucial for safely stopping the vehicle in case of a failure of the primary braking system. The parking brakes are essential for securely holding the vehicle in place when it is stationary, particularly on inclines or declines. Service brakes are the brakes used during normal operation to slow down or stop the vehicle. This combination ensures that the vehicle can be operated safely under various conditions and provides multiple levels of redundancy in the braking system. Each component plays an important role in maintaining safety and control while driving.