What type of vehicle requires the driver to have an air brake endorsed driver's license?

The correct type of vehicle requiring the driver to have an air brake endorsed driver's license is one equipped with air-over-hydraulic brakes. This system combines the functions of air and hydraulic brakes to enhance braking performance, particularly in larger and heavier vehicles.

In Canada, the air brake endorsement is mandated because those brakes operate differently from standard hydraulic brakes, using compressed air to engage the braking system. Drivers need specialized training to ensure they understand how to control and operate vehicles with this braking system safely. This includes knowledge of how to check for air leaks, how the air brakes function, and the importance of maintaining appropriate air pressure.

While weight classifications, off-road vehicles, or passenger bus designs factor into broader licensing requirements, they do not specifically pertain to air brake systems. Therefore, the critical aspect of requiring an air brake endorsement lies in the vehicle's braking technology, specifically the presence of air-over-hydraulic brakes.