Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question What do anti-lock brakes do? Answers Help a driver avoid wheel lockup Lock up the front wheels Prevent a vehicle from accelerating while traveling uphill Prevent a vehicle from accelerating while traveling downhill Explanation The function of an Anti-Lock Braking System (ABS) is to prevent the vehicle's wheels from locking up from hard brake application. Take a FREE Practice Test Now This questions appears in the following tests: Kansas Knowledge Test Class A , Maryland Knowledge Test Class A , North Carolina Knowledge Test Class B , Texas Knowledge Test Class B , West Virginia Knowledge Test Class B , Alabama Air Brakes , Colorado Air Brakes , Delaware Air Brakes , Florida Air Brakes , Mississippi Air Brakes , Montana Air Brakes ,