Question Truck tractors with air brakes built on or after March 1, 1997 must have: Answers An Anti-Lock Braking System (ABS). Bluetooth. GPS. A rear back-up camera. Explanation Truck tractors with air brakes built on or after March 1, 1997 must be equipped with Anti-Lock Braking Systems (ABS). Take a FREE Practice Test Now This questions appears in the following tests: Nevada Knowledge Test Class B , Tennessee Knowledge Test Class B , West Virginia Double , Colorado Air Brakes , Delaware Air Brakes , Kansas Air Brakes , Massachusetts Air Brakes , North Dakota Air Brakes ,