0 a metal bar across the roof of a car, especially one used for racing, that protects the people inside if the car turns over --
A roll bar is a single bar behind the driver that provides moderate roll-over protection.
For the suspension component called a roll bar or anti-roll bar, see sway bar.
Due to the lack of a protective top, some modern convertibles utilize a strong windscreen frame acting as a roll bar.
Many sand rails also utilize roll bar padding and fire extinguishers.
The chassis was a traditional ladder frame with a roll bar integrated into the windscreen frame and behind the driver.
He was saved by the roll bar when sliding upside down.
There was no roof but a rear roll bar provided roll over protection.
Cars without the bench are equipped with a two-point chromed roll bar behind the cab, which fits beneath the convertible roof.
