Night Operation and Adverse Conditions
What this domain tests
This domain tests visibility management, speed choice, and vehicle control when light, weather, or road conditions reduce safety. Passenger buses add responsibility for standing passengers and schedule pressure.
Core rules
- Use headlights from sunset to sunrise and whenever visibility is reduced. Use low beams in fog, rain, or snow; high beams reflect back and reduce visibility.
- Slow down and increase following distance. Do not overdrive your headlights. At night, scan for pedestrians, animals, reflectors, and unlit vehicles.
- Use wipers, defroster, and mirrors. Keep the windshield and lights clean. Dim interior lights so they do not reflect on the glass.
- In rain, snow, ice, or dust, avoid cruise control. Brake and steer gently. If visibility drops below a safe level, pull off the road, turn on hazards, and wait.
- Watch for high winds, especially on bridges and open stretches. Grip the wheel, reduce speed, and allow extra space.
- Manage fatigue. Night driving conflicts with the body clock; use legal rest, not energy drinks, and stop when drowsy.
Worked example
A dust storm reduces visibility to about 100 feet. The driver slows but keeps moving at 45 mph to stay on schedule. Correct reasoning: 45 mph is overdriving the available sight distance. The driver should slow sharply, use low beams and hazards as appropriate, and pull off if conditions do not improve.
Traps that cost marks
Using high beams in fog. Leaving cruise control on slick roads. Parking on the shoulder without lights. Assuming a heavy bus stops better on ice. Pushing through fatigue.