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Antilock Braking Systems

Antilock Braking Systems are not named by that term anywhere in 49 CFR 383.111(a); the closest required-knowledge anchor is (a)(3), which names skids and loss of brakes as an emergency-procedure topic. The actual ABS equipment mandate is directly codified at 49 CFR 393.55, which sets manufacture-date thresholds and a trailer malfunction-lamp requirement.

Practice Antilock Braking Systems

5 Questions

  1. Under federal regulation, which of these vehicles must have antilock brakes (ABS) installed?
  2. What does federal regulation require of trailers manufactured on or after March 1, 1998, regarding antilock brakes?
  3. What does antilock braking system (ABS) actually do for a driver?
  4. How should a driver apply the brakes on a vehicle equipped with ABS?
  5. If a vehicle's ABS malfunction lamp stays on after starting the engine, what should the driver do?