A rollover protection structure or rollover protection system (ROPS) is a system or structure intended to protect equipment operators and motorists from injuries caused by vehicle overturns or rollovers. Like rollcages and rollbars in cars and trucks, cabs, frames or rollbars on agricultural and construction equipments, a ROPS involves mechanical components attached to the frame of the vehicle that maintain a clearance zone large enough to protect the operator's body in the event of rollover.

A rollover or overturn is a type of vehicle crash in which a vehicle tips over onto its side or roof. Rollovers have a higher fatality rate than other types of vehicle collisions.