What is the main function of the air horn during a pre-trip inspection?

The primary function of the air horn during a pre-trip inspection is to demonstrate its functionality. This is crucial for ensuring that the air horn is working properly, as it is an important safety device used to alert other drivers and pedestrians of the vehicle's presence. Proper functionality of the air horn contributes to overall road safety, making it essential that the driver confirms it operates effectively during the inspection process.

While signaling other drivers, alerting the driver, and indicating the bus is operational are relevant aspects of using an air horn, the act of checking its functionality serves to verify that it meets safety standards and can be relied upon when necessary. Ensuring all components of the vehicle, including safety devices such as the air horn, are in working order is a critical part of the pre-trip inspection process.