Why is it necessary to observe the load distribution plan?

Observing the load distribution plan is essential because it helps prevent exceeding the axle loads, which protects the vehicle structure and the road from damage. Proper load distribution also ensures that the steering capacity is maintained, meaning the vehicle remains controllable and safe to drive. Without correct load distribution, the vehicle could become unstable or harder to maneuver, increasing the risk of accidents. The third option, making loading and unloading easier, is not a primary safety reason but more about convenience.