Vehicles are most stable when they are positioned on their:

Vehicles are most stable when they are positioned on their wheels because this is the design configuration intended for normal operation. A vehicle's center of gravity is lowest when it is resting on its wheels, allowing for optimal balance and stability. This position also aligns with the way a vehicle is engineered, promoting structural integrity and minimizing the risk of rolling over.

When a vehicle is on its wheels, the suspension system can also absorb shocks and impacts, contributing to stability during emergency situations. Conversely, vehicles on their side, roof, or back have compromised stability due to their altered center of gravity and distribution of weight, increasing the risk of further movement or collapse. Thus, positioning a vehicle on its wheels is crucial for maintaining safety and stability during rescue operations.