An Anti-Lock Braking System (ABS): Question An Anti-Lock Braking System (ABS): Answers Is not available for vehicles with air brakes. Is not helpful in most driving situations. Can help you maintain control when braking. Explanation Anti-Lock Braking Systems (ABS) are compatible with air brakes and help a driver maintain control of their vehicle by preventing wheel lockup. This questions appears in the following tests: Connecticut Air Brakes Iowa Air Brakes Kentucky Air Brakes Louisiana Class A Knowledge Test Louisiana Air Brakes Maryland Air Brakes Mississippi Air Brakes Nebraska Air Brakes South Carolina Class A Knowledge Test Utah Air Brakes Vermont Air Brakes Virginia Air Brakes