Which brake system is primarily utilized for stopping a vehicle under normal operating conditions?

The service brake system is primarily designed for stopping a vehicle under normal operating conditions. This system engages when the driver presses the brake pedal and is responsible for bringing the vehicle to a stop during everyday driving situations. It is engineered to handle high-speed stops and is crucial for the safe operation of the vehicle.

In contrast, the other systems serve different purposes. The emergency brake system is designed as a backup to stop the vehicle in case the regular brakes fail, mainly used in critical situations. The parking brake system is intended to keep a vehicle stationary when parked, preventing it from rolling, and might not be effective for rapid stops while driving. The ABS (Anti-lock Braking System) enhances the vehicle's braking performance by preventing wheel lockup during hard braking, but it operates as a supplementary feature to the service brake system rather than the primary means for stopping in normal conditions.