During heavy vehicle operation, what is a common cause of loss of traction?

Improper loading is a significant factor that can lead to a loss of traction when operating heavy vehicles. When a vehicle is loaded incorrectly, it can affect the weight distribution across its axles, leading to an imbalance. This imbalance may cause certain tires to carry more weight, which can decrease the contact surface between the tire and the road, reducing grip. For instance, if a load is too far to the rear or the front, it can cause the vehicle's center of gravity to shift, making it more prone to slipping or skidding, particularly on slippery surfaces. Proper load distribution is critical in maintaining control and ensuring the vehicle has optimal traction.

The other options can have their impacts, but they do not directly relate to the primary reason for loss of traction as significantly as improper loading does. Frequent driving stops can lead to different forms of wear but are not typically a direct cause of traction loss. Low fuel efficiency may indicate engine issues or driving habits, but it's not a direct traction concern. High engine RPM can affect performance and efficiency but does not directly influence the traction capabilities of the tires under typical operating conditions. Properly understanding load management is vital for safe heavy vehicle operation.