What does truck underride mean?

Truck underride refers to a situation where a smaller vehicle becomes positioned beneath a truck or trailer, typically as a result of a collision. This is a serious safety hazard because the smaller vehicle's occupants may be at a higher risk of severe injuries, given that the impact can occur at the height of the truck's chassis.

Understanding this term is critical in the context of extrication procedures since responders need to identify the mechanisms of injury and plan their approach accordingly. For instance, they must ensure that the scene is safe, and that the involved parties are treated properly, especially if someone is trapped beneath the truck.

The other options describe different scenarios not related to the concept of underride. For example, improper loading and a flat tire refer to the operational state of a truck rather than its interaction with other vehicles, while detachment of the trailer from the truck does not imply that another vehicle is involved in a collision under the truck.