What is the primary operational difference between service brakes and parking brakes?

The primary operational difference between service brakes and parking brakes lies in their design and functionality. Service brakes are typically hydraulic systems designed to provide rapid and effective stopping power when a vehicle is in motion. They are engaged through the brake pedal and are essential for regular driving and safety during operation.

On the other hand, parking brakes (often referred to as hand brakes or emergency brakes) are usually operated by a cable system, which allows them to maintain the vehicle's stationary position when parked. This system is crucial for preventing the vehicle from rolling and is engaged independently of the service brakes. The differentiation in their mechanisms—hydraulic for service brakes and cable for parking brakes—highlights their different roles and operational requirements in vehicle functionality.