Which of the following is a true statement about how antilock braking systems (ABS) affect vehicle braking?
General Knowledge • Free CDL Practice Question
Regulation
49 CFR 393.55 (ABS equipment requirement); AAMVA CDL Manual Sec. 2.18.1, 2.18.4, 2.18.8, pp.2-35 to 2-36
Why This Matters
A common misconception is that ABS makes a truck stop faster or brake harder. In reality its only job is to preserve steering control by preventing lockup, so drivers who misunderstand this may brake less carefully, believing ABS will compensate, when stopping distance is unaffected and over-braking is still dangerous.