For large buses, when does the low pressure alarm usually activate?

The low pressure alarm for large buses is designed to activate at a pressure range around 80-85 psi. This threshold is crucial for ensuring the safety and operation of the vehicle. When the pressure falls to this level, it indicates that the air pressure in the braking system is getting low, which can impair braking performance and increase the risk of an accident.

Maintaining proper air pressure is essential for the safe operation of large buses, which rely on air brakes that have a specific operating pressure range. The alarm serves as a warning to the driver that immediate attention is required to avoid potential braking issues. By being informed about this critical pressure level, drivers can act promptly to ensure the vehicle remains safe for operation. This understanding helps in promoting safe practices when operating large commercial vehicles.