Hazard Perception and Emergency Maneuvers
This domain tests whether you spot hazards early and choose a controlled response instead of a panic maneuver. The exam covers escape routes, brake technique, downgrades, hydroplaning, and tire failures.
Scanning and braking
Scan 12 to 15 seconds ahead and identify an escape route. Cover the brake when a hazard is developing. Use controlled braking-firm pressure without locking the wheels-or stab braking if wheels lock: apply fully, release when wheels lock, and reapply. Do not pump air brakes rapidly; that wastes air pressure.
Downgrades, water, and tire failure
Select a lower gear before a downgrade and use engine braking. If brakes fade, slow down, downshift, and use a runaway truck ramp if necessary. In heavy rain, reduce speed to avoid hydroplaning; do not brake hard or steer sharply. If a front tire blows, hold the wheel firmly, keep the vehicle straight, ease off the accelerator, and let it slow. Hard braking can pull you into another lane.
Worked example
A front tire blows at highway speed. Your first action is to grip the wheel and keep the vehicle straight. Ease off the accelerator and avoid hard braking; let rolling resistance slow you. Steer gently to the shoulder only after speed drops. Slamming the brakes or jerking the wheel can cause a loss of control or a rollover.
Traps that cost marks
Swerving when braking would be safer; locking the wheels; using the parking brake at highway speed; and waiting until a downgrade is already steep before selecting a lower gear. Also do not assume ABS shortens stopping distance-it mainly helps you steer while braking.