Roll cages are often used in professional rally cars

Convertibles have particular concerns for roll-over protection

A roll bar is a single bar behind the driver that provides moderate roll-over protection. Rallying (international) or rally racing (US) is a form of automobile racing that takes place on normal roads with modified production or specially built road cars. ... Audi TT at a car show in Bristol, England. ... Audi TT at a car show in Bristol, England. ...

Roll hoops are essentially two roll bars, one behind the driver and one behind the passenger. Somtimes just a single roll hoop behind the driver is used.

A roll cage is a specially constructed frame built around the cab of a vehicle to protect the driver from being injured in an accident, particularly in the event of a roll-over. Roll cages extend in front of the driver, next to the A-pillar, to provide as much high-speed protection as possible in a coupé. This is compared to the protection provided in open wheel racing, where a solid shell encases the majority of the driver's body. 1995 Buick Riviera coupe A coupé (from the French for cut) or coupe is a two or four-seater car with a fixed roof and two doors. ... Open-wheel racing refers to a type of motor racing in which the wheels of the cars are not housed inside fenders, as in stock car or touring car racing, but rather out in the open at the end of readily-visible axles and suspension systems. ...