School Bus CHP Practice Test

Question: 1 / 400

What is the minimum tire tread depth required for the rear axle on a school bus?

6/32

2/32

The minimum tire tread depth required for the rear axle on a school bus is set at 4/32 of an inch. This standard is crucial for ensuring adequate traction, especially in wet or slippery conditions, which is particularly important when transporting children. Adequate tread depth helps prevent hydroplaning and maintains effective braking performance.

Having a tire tread depth of at least 4/32 inches ensures that the tire can channel water away from the contact patch effectively, allowing for better grip and stability. This depth is also significant for maintaining the overall safety and performance of the bus, as worn tires can lead to increased stopping distances and reduced handling capabilities. Hence, adherence to this minimum tread depth is essential for the safety of both the passengers and other road users.

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