Which vehicles are excluded from truck standards?

Vehicles used for earth moving are excluded from truck standards because they often have specialized designs and operational functions that differ significantly from standard truck configurations. These vehicles, such as excavators, bulldozers, and loaders, are built for specific tasks related to construction and excavation, rather than for general transportation or freight hauling. The primary focus of the truck standards is to ensure safety and efficiency for vehicles primarily used on public roads, which does not extend to the unique nature of earth-moving equipment. As a result, regulations applicable to trucks may not directly pertain to these types of vehicles, allowing them to operate under different guidelines tailored to their specific functions.