Emergency Maneuvers
Braking, steering, and skid control when something goes wrong.
Endorsement: General Knowledge · Source: FMCSA CDL Manual (public domain)
Emergency maneuvers are the high-stakes content of the General Knowledge exam: emergency braking, evasive steering, skid recovery, and dealing with brake failure. The FMCSA CDL Manual is explicit that quickly steering around an obstacle is almost always safer than trying to brake to a stop, because at highway speed even an emergency stop takes the better part of a football field. The recommended technique is a controlled steer back into the original lane immediately after the avoidance, because your truck will continue tracking left or right unless you actively recenter.
For emergency braking on vehicles without ABS, the manual teaches controlled braking (apply pressure as hard as you can without locking the wheels) and stab braking (full brake until wheels lock, release until wheels turn, reapply). On ABS-equipped vehicles, push and hold the pedal — do not pump. Front-wheel skid recovery means letting up on the accelerator and steering smoothly toward your intended path; rear-wheel skid (the trailer or drive axles sliding) requires steering in the direction of the skid and easing off the throttle.
Brake-failure procedures are a major exam topic. If service brakes fail downhill, downshift, gradually pump the brake pedal in case some pressure remains, use the parking brake gently (not slammed, which would lock wheels and skid), and steer for an escape ramp if one is available. Escape ramps are designed to stop runaway trucks safely; if one is available, use it without hesitation, even if it means damaging the vehicle. If no ramp is available, look for an open shoulder or uphill grade and steer for that. Never try to ride out a runaway down the grade — speed will keep building until the truck rolls.
Key terms to memorize
- GVWR
- GCWR
- CDL
- CLP
- medical examiner's certificate
- reasonable suspicion
- hours of service
Other General Knowledge topics
- Pre-Trip Inspection — A systematic seven-step pre-trip walk-around to catch defects before they put you and the public at risk.
- Basic Vehicle Control — Backing, turning, and low-speed maneuvering safely with a vehicle whose blind spots are larger than most cars are long.
- Hazard Perception — Reading the road, recognizing developing problems, and acting before they become emergencies.
- Hours of Service — The federal limits on driving and on-duty time, and the records that prove you complied.
Test what you learned
Now that you have the Emergency Maneuvers material in your head, drill the General Knowledge practice test. The questions are drawn from the same FMCSA source material this article paraphrases. For state-specific framing, jump to your state page and pick the General Knowledge test for your jurisdiction.