Which factor does not affect the maximum allowable gross weight of a commercial vehicle?

The maximum allowable gross weight of a commercial vehicle is determined by several specific factors related to the vehicle's design and structure. One significant aspect is the cargo weight, which is variable depending on what the vehicle is carrying. The maximum gross weight regulation focuses on the vehicle's capabilities and structural allowances, rather than the nature of the load itself.

The weight allowed on the steering axle is a relevant factor because it directly impacts how weight is distributed across the vehicle, affecting handling and safety. The distance between the axles is crucial too, as it determines the weight distribution and stability of the vehicle. Similarly, the number of axles plays a critical role in supporting a higher gross weight, as each axle can bear a portion of the load.

Cargo weight, while important for operational purposes, does not influence the predetermined maximum weights that a vehicle is certified to carry. Instead, it is the responsibility of the driver or operator to ensure that the cargo loaded does not exceed these predetermined limits, which are based on the vehicle’s design specifications. Therefore, in the context of determining the maximum allowable gross weight, cargo weight itself is not a contributing factor as established by regulations.