ABS helps you: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Virginia Do you currently have car insurance? Yes I have insurance. Great, you're all set! Click here if you still want to compare rates. No, I need insurance and I want to compare options. Question ABS helps you: Answers Lock up your wheels. Keep your wheels from locking up. Count the number of students boarding the bus. Explanation The function of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up when the driver brakes hard on a slippery surface. This questions appears in the following tests: Arizona Bus Arkansas Bus Iowa Bus Iowa Bus Maine Bus Michigan Bus New Mexico Bus Oklahoma Bus South Carolina Bus Vermont Bus Washington Bus Wyoming Bus