What safety measure is associated with parking brakes on a bus?

The effectiveness of the brake system is crucial for the safe operation of any commercial vehicle, including buses. When discussing parking brakes, it's important to understand that they are designed to securely hold the vehicle in place when it is stationary. A well-functioning parking brake can prevent accidental movement of the bus, which is especially critical during passenger boarding and deboarding, as well as when the bus is parked on an incline.

While all the components related to parking brakes play significant roles in safety practices, the focus of this question is on the effectiveness of the brake system as a whole. A reliable brake system ensures that the parking brake will engage correctly, minimizing the risk of rolling or accidents.

Engaging the parking brake at all times when the bus is not in motion is a standard practice, but the core safety measure revolves around the overall effectiveness of the brake system in maintaining the bus's stationary position. Hence, understanding the comprehensive functionality of the brake system is key in ensuring safety in operations involving large vehicles like buses.