What is a dual air brake system?

A dual air brake system is specifically designed with two separate air brake systems that utilize a single set of controls. This configuration enhances safety and reliability in braking performance. In the event that one of the air brake systems fails, the other system can continue to function, allowing the driver to maintain control of the vehicle. This redundancy is crucial, especially in larger vehicles, where braking power is essential for safe operation.

The reliance on a single set of controls ensures that the driver has consistent and manageable braking feel, regardless of which system is engaged. The design offers a smoother operation and simplifies the driver's experience while providing the added safety dimension that dual systems present.

Hydraulic systems, while common, do not pertain to dual air brake systems, which are specific to air-operated mechanisms. Additionally, though dual air brake systems are prevalent in larger vehicles, they are not exclusively designed for them; they can be found in various commercial vehicles that require robust braking capabilities. Lastly, a system that operates without any air pressure would be non-functional and therefore does not meet the definition of a dual air brake system.