Antilock braking systems (ABS):
Correct. ABS prevents wheel lockup during hard braking, allowing you to steer to safety. ABS does not necessarily shorten stopping distance.
CDL Practice Question #143
Category: Air Brakes
Why this question matters
This question is one of 71 in our Air Brakes bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.