What is one major benefit of dual air brake systems?

A dual air brake system is designed to enhance safety by providing a backup in case one set of brakes fails. This system utilizes two separate air brake circuits, which means that if one circuit develops a leak or malfunction, the other can still function effectively. This redundancy is critical for maintaining braking power and control, especially in large commercial vehicles where the consequences of brake failure can be severe.

This safety feature ensures that drivers have multiple options to stop the vehicle, significantly reducing the risk of accidents caused by brake failure. In contrast, other options such as lower installation costs, reduced maintenance, or faster cooling do not reflect the primary purpose and advantage of dual systems in terms of their protective nature.