Lights, visibility, and being seen
Lights are for seeing and being seen
Choose the right lights for the job: lighting the road, making yourself visible, or warning others.
What to watch for
The question mentions dusk, night, tunnels, poor visibility, or a broken-down vehicle.
The rule
The rule explains exactly how to answer any question of this type — and why the obvious wrong answer fails.
See the rule →Common trap
Don't switch lights on out of habit — think about what visibility problem you're solving.