What is a dual air brake system?

A dual air brake system is designed to enhance the safety and reliability of braking in larger vehicles, particularly those that require significant stopping power, such as trucks and buses. The essential characteristic of this system is that it consists of two independent air brake circuits. Each circuit can function on its own, providing a backup in case one system fails. This duality ensures that if one brake system suffers a malfunction, the other can still operate effectively, thereby helping to prevent accidents and maintain control of the vehicle.

The system is controlled by a single set of controls that allows the driver to operate both brake circuits simultaneously. This setup is crucial for larger vehicles since it maximizes braking efficiency and contributes to overall vehicle safety. The presence of dual systems alleviates the risk posed by a complete brake failure, reinforcing the importance of redundancy in braking operations.