What is the brake system that applies and releases the brakes upon using the brake pedal?

The service brake system is the primary brake system in a commercial vehicle that is engaged and released using the brake pedal. It is designed to slow down or stop the vehicle while it is in motion. When a driver presses the brake pedal, hydraulic or air pressure is applied to the brake components, engaging the brakes and allowing for safe deceleration or stopping.

This system is essential for normal driving operations, including stopping at traffic signals and navigating various road conditions. Its direct connection with the driver’s input through the brake pedal distinguishes it from other brake systems that serve different purposes.

For instance, the parking brake system is intended to keep the vehicle stationary when parked and is usually engaged manually. The emergency brake system is designed as a backup to bring a vehicle to a stop if the primary brakes fail and also engages manually. The anti-lock brake system helps maintain steering control during hard braking situations by preventing wheel lock-up, but it does not apply or release brakes in the conventional sense of road operations. Understanding these distinctions is key in recognizing the importance of the service brake system in overall vehicle safety and operation.