A rollover protection structure or rollover protection system (ROPS) ( or ) is a system or structure intended to protect equipment operators and motorists from injuries caused by vehicle
overturn
''Overturn'' is a video game developed by Japanese company Studio Zan for WiiWare. It was released in Japan on December 2, 2008, in North America on August 3, 2009, and in Europe on February 12, 2010, by Gamebridge as ''Overturn: Mecha Wars''.
...
s 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.

Commonly found on
heavy equipment
Heavy equipment or heavy machinery refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. ''Heavy equipment'' usually comprises five e ...
(i.e.
tractor
A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most comm ...
s),
earth-moving machinery and
UTVs used in
construction
Construction is a general term meaning the art and science to form objects, systems, or organizations,"Construction" def. 1.a. 1.b. and 1.c. ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0) Oxford University Press 2009 and ...
,
agriculture
Agriculture or farming is the practice of cultiv