What is the minimum tread depth on the steering axle of a school bus?

The minimum tread depth on the steering axle of a school bus is indeed 4/32 of an inch. This requirement is in place to ensure proper traction and handling, which are critical for the safety of the bus and its passengers. A sufficient tread depth allows for better grip on the road, especially in adverse weather conditions such as rain or snow, and helps prevent hydroplaning.

Maintaining this minimum tread depth also contributes to overall vehicle stability, which is essential when navigating turns and performing emergency maneuvers. In contrast, tread depths that are lower than this minimum can lead to compromised performance and increased risk of accidents. Thus, adhering to this regulation is vital for the safety of students being transported.