What severity type is associated with operating a non-ROPS tractor and experiencing a rollover?

Operating a non-ROPS (Roll-Over Protective Structure) tractor and experiencing a rollover is classified as catastrophic severity because rollovers on such machinery can result in very serious or fatal injuries. ROPS are designed to provide safety and protection to operators in the event of a rollover by preventing the operator from being crushed by the tractor. Without this protective structure, the risk of severe injury or death dramatically increases, particularly from the weight of the tractor itself during a rollover situation.

Given these circumstances, the consequences of encountering a rollover on a non-ROPS tractor are inherently much more severe, leading to the classification of this type of incident as catastrophic. The other severity types—minor, moderate, and severe—do not encompass the extreme risks associated with the absence of a safety structure in a high-risk scenario such as a rollover, which is why they would not be considered appropriate in this context.