Which stability type measures a truck's resistance to overturning forward or rearward?

Longitudinal stability specifically refers to a vehicle's resistance to overturning in the forward or rearward direction. This type of stability is crucial when considering the weight distribution of the load and the center of gravity of the truck. When a truck accelerates or decelerates, any shift in the center of gravity can affect its ability to stay upright. Proper management of load placement and understanding how the truck's weight interacts with its design are essential to maintaining longitudinal stability, especially when traversing slopes or during sudden movements.

In contrast, lateral stability focuses on the resistance to tipping over sideways, which is influenced by factors like wheelbase and load positioning but does not directly pertain to the forward and rearward tipping behavior. Vertical stability is generally concerned with the overall vertical support of the vehicle, while dynamic stability relates to stability during movement and when handling loads in motion. These concepts, while relevant to vehicle safety, do not directly address the specific risks associated with overturning forward or rearward.