What is the proper response if air pressure in the bus's air brakes system falls below the warning threshold?

When the air pressure in a bus's air brakes system falls below the warning threshold, it indicates a potential failure in the braking system that could jeopardize safety. The correct response in this situation is to pull over immediately. This is essential because reduced air pressure can lead to diminished braking power, making it difficult to stop effectively.

By pulling over right away, the driver ensures that they can safely assess the situation, check for leaks or other issues, and address any problems before continuing on the road. This response safeguards both the passengers and others on the highway. Continuing to drive with low air pressure could result in a complete brake failure, leading to dangerous situations. Therefore, the immediate safe action is to stop the vehicle as soon as conditions allow.