You should use low beam headlights when driving a vehicle at night when…?
- Another driver dims his lights
- Meeting or following another vehicle ✓
- Approaching an intersection
- Blinded by the headlights of an approaching vehicle
Answer: B. Meeting or following another vehicle
Use low beam headlights at night when you are meeting or following another vehicle.
Why this is the answer
The handbook says high beams are only for unlit roads at night when no vehicles are approaching or in front of you. It also says you must dim your high beams when you are within 150 metres of another vehicle, whether you are meeting it or following it. That makes low beam the correct setting when another vehicle is involved.
Why the other answers are wrong
- A. Another driver dims his lights — Another driver dimming his lights is not the condition the handbook gives for choosing low beams; the rule is about meeting or following another vehicle.
- C. Approaching an intersection — Approaching an intersection is not the condition the handbook ties to using low beams; the passages connect dimming to other vehicles.
- D. Blinded by the headlights of an approaching vehicle — Being blinded by an approaching vehicle's headlights is a glare problem, and the passages discuss glare strategies such as adjusting your mirror, not switching to low beams as the stated rule.
Remember it
High beams are for empty dark roads; once a vehicle is ahead or coming toward you, switch down.