a cab or frame that provides a safe environment for the vehicle operator in the event of a rollover and must pass a series of moving and non-moving crush tests

a specially made roll bar for a tractor

a structural component attached to vehicles (like a roll-bar) which is designed to protect the operator if the vehicle overturns during operation

Roll Over Protection System.  Steel frame around operating area which protects driver in the event of roll over.  May be enclosed (EROPS) or open (OROPS).

Roll Over Protection System. ROPSs are found on later model tractors and were made mandatory on tractors over a certain weight.

Roll Over Protective Structure. A roll bar or similar device to help protect the driver in case the machine tips over.

An acronym for Roll-Over Protection. It refers to safety bars attached to the cab of a farm tractor that protects the driver in the event of a roll-over. All tractors are required to have ROPS.